Penny Floor - don't know if I would have the patience for a whole floor. but a coffee or patio table would be nice! Also an easier way to do it is to put out the pennies then flatten then by, I don't know, maybe a broom or some thing.
This clever gadget, called Activ, makes it possible to harness the kinetic energy created by your own body and transform it into electricity! With each step, it juices up the battery a little more. After it’s full, just attach a USB cord directly to Activ
thebeastfeed: “Amoeba Modular USB Flash Drive (concept) “Ever been in a situation where you have loaned your USB stick to someone and accidentally shared some sensitive files (maybe naughty pics) that.