Not yet tested on real condition, but by blowing in it we feel it needs pretty much energy to rotate. Need a minimum of water pressure to get energy. btw water flowing from a house fawcet will be enough.

Not yet tested on real condition, but by blowing in it we feel it needs pretty much energy to rotate. Need a minimum of water pressure to get energy. btw water flowing from a house fawcet will be enough.

Not yet tested on real condition, but by blowing in it we feel it needs pretty much energy to rotate. Need a minimum of water pressure to get energy. btw water flowing from a house fawcet will be enough.

very fun! Put it before water tap and connected to a LED light so you will have free light while washing the dishes!

very fun! Put it before water tap and connected to a LED light so you will have free light while washing the dishes!

very fun! Put it before water tap and connected to a LED light so you will have free light while washing the dishes!