Hydro Power Calculator
Posted in: $10 - $19.99Leave a comment
This environmentally friendly calculator is great for your kids! All you have to do is fill the fuel cells with plain 
water and you’re good to go. It operates just like a normal calculator, but it’ll teach the kids that there are alternative ways to science. It doesn’t get any more eco friendly and educational than this Hydro Power Calculator! :)
How much under $29.99?
A lot: $10.95 on Amazon.
Via Neatoshop.
