Tree of Knowledge - Go Lab Series: Crystal Radio Build your own working crystal radio. Look for and pick up radio stations. Earphone and antenna included. No tools or batteries required. Remember the days of the first radio. Ages 8 and up

Tree of Knowledge - Go Lab Series: Magic Magnet Build a real electric motor! This is a simple kit for future engineers and includes electro-magnetism activities. You can even power your own motor boat! Ages 8 and up

Tree of Knowledge - Power Tech Series: Physics Lab Exciting Experiments. Have no fear of physics! 250 captivating experiments which will introduce you to this fascinating field! Experiment with electricity, magnetism, motor, gases, liquids, heat, sound, force, pressures and motion. Ages 8 and up

Tree of Knowledge - Go Robotics Series: The Guide Robot The Guide Robot senses objects in its path using an infrared ray. The kit also includes parts for inventing your own robot arm. No soldering required. Ages 8 and up

Tree of Knowledge - Go Robotics Series: Treasure Finder Find hidden riches with this treasure finder robot! This robot uses a metal detector to discover metallic objects. The kit also includes parts for inventing your own robot arm. No soldering required. Ages 8 and up

Tree of Knowledge - Go Robotics Series: Wake Me Robot The Wake Me Robot uses a light sensor, making it sensitive to light. The kit also includes parts for inventing your own robot arm. No soldering required. Ages 8 and up

Tree of Knowledge - Go Science Series: Circuit Lab Welcome to the world of electricity! Specially designed kit to learn, play and have fun safely with basic electric circuits. Assemble more than 20 different and fascinating circuits for motor, buzzer, lights, and other circuits. Make alarms and games, and even invent your own circuits. Ages 8 and up

Tree of Knowledge - Go Robotics Series: Remote Control Robot Build your own remote control robot controlled by your TV remote! The kit also includes parts for inventing your own robot arm. No soldering required. Ages 8 and up

Tree of Knowledge - Power Tech Series: Volcano Wonder Lab Get in touch with nature at its most powerful and awesome. Make an erupting volcano, complete with light and sound effects. Trace the development of volcanoes and produce different types of eruptions. Other activities include: how to make a fire extinguisher, a lava light, chocolate lava and much more. Ages 8 and up

Tree of Knowledge - Go Science Series: Weather Lab Over 30 fascinating activities all about weather and climate. Build your own barometer, weather vane, rain gauge, and hydrometer. Observe the weather traits and see how theyÂ’ll affect tomorrowÂ’s weather. Make a rainbow, produce clouds, lightning, rain, and even a thunderstorm! Ages 8 and up

Tree of Knowledge - Go Lab Series: Alarm Make your own intruder alarm! Protect your valuable belongings. Connect the alarm to a door, a window, or whatever you want to guard. Learn how circuits work. lncludes alarm panel, buzzer, battery holder, and electronic components. Ages 8 and up

Tree of Knowledge - Go Science Series: Detection Lab This is a fascinating kit dealing with all aspects of bubble science. Suitable for age 8 . This is not just a kit for blowing bubbles, this is real BUBBLEOLOGY! Make giant bubbles, create 3D bubbles to your own design, become a bubble artist, perform bubble tricks and learn some amazing bubble facts. Ages 8 and up

Tree of Knowledge - Power Tech Series: CD Electro Lab This unique electricity kit offers a CD Rom program together with a base and components. The software, which is also used in school systems, can create unlimited circuits using both pictorial and schematic diagrams. No soldering necessary! Ages 8 and up

Tree of Knowledge - Go Science Series: Chemistry Lab 35 fun activities with home science and kitchen chemistry. Investigate with safe and simple materials - discover basic scientific laws and phenomena. Grow crystals; create a volcano; separate pigments; make your own gook, glue, perfume and plastic; split up water; learn about pH, colloids and emulsions; write magic messages; see gases expand and more! Ages 8 and up

Tree of Knowledge - Power Tech Series: Chemistry Lab 120 Unique Experiments. Learn about chromatography, acids, bases and salts. Indicators, reversible reactions, atoms, molecules and ions. Includes crystal growing, glass working and chemical magic. Ages 8 and up

Tree of Knowledge - Power Tech Series: Crystal Wonder Lab Crystal Wonder. A wonderful kit packed with exciting activities. Make crystals of all shapes, sizes and colors. The kit includes 12 different colored salts, a display stand and al the equipment needed to produce crystals. Other activities include making jewelry, creating a crystal garden and decorative crystal gifts. Ages 8 and up

Tree of Knowledge - Go Science Series: Dynamics Lab Full color, easy-to-read instruction manual with graphic illustrations. This kit contains over 45 activities such as building a fan, making a yo-yo, and making a hydrometer while exploring the principles of gravity, inertia, mechanics, friction, and surface tension. Ages 8 and up

Tree of Knowledge - Power Tech Series: Ecology Lab 150 Exciting Experiments. Learn about how a thermometer is built, the Greenhouse Effect, ice crystals, calorie calculations, how plants make oxygen, how to make a two-colored flower, testing for acid rain, bacteria in the air, what is bio-degradable, and barometers. Ages 8 and up

Introduction to electricity and electrical circuits. An electricity kit for the young child! Learn about circuits, switches, conductors, insulators, fuses and work with them! Simple theoretical explanations about voltage, current, amperes, Ohm's law, Morse Code and more. Build your own light circuits, electric puzzles and electric light bulb. No soldering. Batteries required. Kit is in keeping with elementary school science curriculum. Ages 8 and up

Tree of Knowledge - Power Tech Series: Electronics Lab 80 basic electric experiments include electromagnetics, electrostatics, electric motor, electric meters, electrodes, series and parallel circuits, electromagnetic compass, magnetism, making batteries and static electricity. Ages 8 and up

Tree of Knowledge - Go Science Series: Weather Lab Electronics for beginners! Hours of interest in this fascinating field. Build 6 exciting electronic devices - a burglar alarm, a fire alarm, a musical organ, a siren, a sound effects generator and a radio. Console and electronic components included. Easy to design your own additional circuits. Battery required. Ages 8 and up

Tree of Knowledge - Power Tech Series: Energy Lab Over 200 Challenging Experiments. With this kit you will understand the various forms of energy and its many sources. Learn about making a windmill, the steam wheel, the electric motor, the on-off switch, how to light a bulb, make your own battery, and much more! Ages 8 and up

Tree of Knowledge - Power Tech Series: Heart Beat Lab This kit encourages exercise by understanding how the heart works, and how exercise can create a strong and healthy body. With the hand-held adjustable simulator, you can actually follow the circulation of the blood through the heart and body and also adjust the heart beat. The kit also includes a stethoscope, jump rope, pedometer, stopwatch, and a colored manual with explanations and activities. Ages 8 and up

Tree of Knowledge - Power Tech Series: Hydro Lab Complete greenhouse system for cultivating plants and vegetables in an "indoor" environment, without soil, using a modern Hydroponics system. The kit comes with a base, adjustable translucent observation cover, four growing trays, fertilizer tank, safe chemicals and bedding for propagating the growth of plants. Ages 8 and up

Tree of Knowledge - Go Lab Series: Lemon Clock Make your own digital clock using natureÂ’s electricity. The kit includes over 18experiments including LEDÂ’s, chemical reactions, electro-chemistry, electro-magnetism, acid/base substances, and invisible inks. Ages 8 and up

Tree of Knowledge - Go Science Series: Detection Lab A fun magnet kit for all the family from age 6 . Amaze your friends with a variety of magnetic tricks, create faces and make an electromagnet. See and feel magnetic forces, make a compass and play magnetic football and billiards. Ages 8 and up

Tree of Knowledge - Go Science Series: My Senses Lab This kit is part of our Body Awareness Science Series, exploring the five senses: sight, hearing, smell, taste, and touch. Perform over 50 fascinating experiments. Use a genuine stethoscope, make a telescope with real lenses and create rainbows with a prism. Prepare perfume and stink bombs with chemistry lab equipment. Learn how to read and send messages in Braille. Also includes many activities suitable for party Ages 8 and up

Tree of Knowledge - Go Science Series: Optics Lab Have fun making optical illusions! Full color, simple graphic instructions - no reading required. This kit gives you an introduction to how a periscope works, principles of reflection, 3D imaging, color filtering, light dispersion and simple animation Ages 8 and up

Tree of Knowledge - Go Science Series: Robotics Lab Join forces with the world of robotics and assemble 3 fantastic robots. One robot detects objects using infra red rays, the wake-up robot is sensitive to light and the third robot is operated by any TV remote control. A separate circuit and body are supplied for each robot: just fix the selected circuit onto the robot base and add the corresponding Ages 8 and up

Tree of Knowledge - Power Tech Series: Solar Lab 150 Challenging Experiments. Convert solar energy. Build a solar electric generator, motor, water heater, furnace, thermometer, crane and solar energy mobiles. Unique experiments with colour optics, electroplating, stroboscopes, thermodynamics and Moire patterns. Ages 8 and up

Tree of Knowledge - Power Tech Series: Super-Chem Lab 100 kitchen activities in chemistry include balloon trick, gas cannon, making a geyser, cleaning old coins, cola volcano, removing an eggÂ’s shell without touching it, making soap bubble solution, making invisible ink, making cheese, potato stamp, finding iron in cereal, and many more! Ages 8 and up

Tree of Knowledge - Power Tech Series: Super-Chem 120 Lab 120 activities with fun science and kitchen chemistry. Make giant soap bubbles and three dimensional soap bubble sculptures. Make monster dough, grow crystals, create secret writing. Prepare your own fun shaped soap, a volcano and a propelled motor boat. Observe the way plants react to chemicals and light. A full colored simple to read instructions manual is included in this kit. Ages 8 and up

Tree of Knowledge - Go Science Series: Bug Lab Exciting kit with over 25 crawling creature activities! Observe and learn all you need to know about bugs, insects and plant life. Kit also includes net, magnifying glass, charts and other simple materials. Go out and start your own collection! Fun for all ages! Ages 8 and up

Tree of Knowledge - Go Science Series: Water Lab Full color, simple graphic instructions - no reading required Make your own sailboat, submarine, hydraulic elevator, and siphons while exploring the principles of floating, sinking, hydraulics, weight and volume! Ages 8 and up

Tree of Knowledge - Go Science Series: Detection Lab Investigate, analyze, decipher and solve the crime! Over 65 activities with fingerprints, secret messages, chromatography, cipher codes, identity detection and more... Kit includes 30X microscope and necessary lab equipment. Ages 8 and up

Tree of Knowledge - Go Lab Series: Water Clock Make a clock that can work just on tap water! You will never needed batteries again! Also works on a variety of household materials such as: cola, fruit juice and even ketchup! Try other materials and see how the clock never stops. This is the best timekeeper you will ever have. Ages 8 and up