Description You can create a circuit with LED lights, and let the LEDs different colors of light by changing different experimental materials to let your child experience the fun of the experiment. Through complete the fruit battery science experiment project with kid, it can create children's imagination, improve hands-on ability, increase scientific knowledge, and cultivate scientific invention hobbies. Features - Color: Assorted color. - Material: Zinc copper. - Size: 4.00 x 1.30 x 0.10cm/ 1.57 x 0.51 x 0.04 inch. - You only need to prepare fruits, vegetables or drinks to assemble a battery to work with led or electronic watches. - Such as: apples, oranges, potatoes, lemons, tomatoes, cola, pears, pineapples, or salt solutions, etc. - By completing the fruit battery science experiment project with your child, let your child experience the mystery of science. - Develop your child's imagination and hands-on ability, and make your child more interested in scientific experiments. - Read the instructions carefully before building the project to avoid damage to the electronic watch or to prevent the LED from working.Package list: 2 sets x fruit battery kits