Cool! A watch powered by lemonade! But can it also work with other liquids? Time to experiment! An eco-battery to build yourself. With this experiment kit, children discover that electricity doesn't always have to come from the outlet. Electrochemistry makes it possible! While assembling the spring contacts, cables, and other electronic components, children learn about the structure of circuits - the instructions show exactly how to do it. A clever gift from KOSMOS with a wow effect - for kids aged 8 to 12.

Incredible! A digital watch draws its power from lemonade! With this experiment kit, children aged 8 to 12 discover that electricity doesn't always have to come from the outlet. Even while assembling the individual parts from the electronics kit, children find out how the circuit of the watch is constructed. Now, just grab the lemonade quickly and let's go! Can the watch also be powered by other liquids or maybe even fruits? Just try it out and keep exploring. The illustrated instructions show step by step how to assemble the eco-battery and explain basic concepts from the field of electricity. A clever gift from KOSMOS with a wow effect!.