Apples, oranges, pineapples, potatoes, etc. can be made into fruit batteries.
The kit includes a digital clock, zinc and copper tape, and multiple wires. Only three potatoes are needed to create a working clock. No battery is needed.

Application:
Intellectual development, hands-on brain, interest training, parent-child communication, interactive toys.

Steps:
First, knead the fruit to make it looser and make the water flow faster, insert two electrodes, connect the wires, and install a diode or electronic clock on them.

Tips:
There are some smaller parts to prevent children from swallowing by mistake.
Recommended age, over eight years old.