You can make a clock that can work just on tap water with this Amazing Water Clock Science Kit by Elenco! You will never need batteries again! Also works on a variety of household materials such as: cola, fruit juice ketchup and even toothpaste! Try other materials and see how the clock never stops. This is the best timekeeper you will ever have.
Recommended Age: 8+ Years
Billable Weight: 1.00 lbs |
