If you have a little scientist at home this item if for you. With this WATER CLOCK kit, you can make a clock that can work just on tap water!

* You will never need 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
* Not for children under 3 years