4M Green Science Water Pump : This water pump can move water along on solar power when the sun is shining. It can also be powered by battery when there is no sunlight. Peek into the future of clean energy! Build your own miniature robot racer powered by salt water! The 4M Salt Water Power Robot Kit provides all the materials needed to assemble this environmentally-friendly, non-toxic robot.When your robot is completed, insert the included aluminum and carbon sheets and simply add salt water. No batteries required! Watch gleefully as your mini robot whizzes across your floor!

Watch the 4M Green Science – Aqua Robot swim along when sunlight shines on its solar cells. Watch this Aqua Robot swim along when sunlight shines on its solar cells. Aqua Robot can be powered by battery when there is no sunlight. A robot fish that floats and paddles on the water’s surface with the power of the sun or a regular battery. Includes robot parts, solar panel and instructions. Requires one AAA battery (not included). Kids love pet fish, they make for great exploration and learning! So why not build a solar-powered Aqua Robot Fish that paddles and swims along the water when the sun shines!

4M – Green Science – Rover Robot

This clever Rover Robot rolls along on solar power when the Sun is shining. It can also be powered by battery when there is no sunlight. Suitable for ages 5yrs & up Contains 1 Body, 1 Gearbox, 1 Rear wheel, 6 Join plugs, 2 Cranks, 1 Eye support, 1 Left arm, 1 Rear wheel support, 1 Right arm, 2 Large wheel, 1 Battery holder, 1 Solar panel holder, 1 Motor, 1 Battery cover, 1 Solar panel, 1 Support arm, 1 Gearbox cover, 1 Pair of wires, 2 Eyes, 5 Screws, 3 Terminal caps. Also required but not included with this kit: Small cross head screwdriver, one 1.5 V AAA batteries. It can be powered by battery when there is no sunlight. Kids enjoy building the robot and assembling the solar kit and watching them work together.