Speaking of toys. I want many of these!
I want to string all these bad boys together and use it to write my poetry in water. Why walk on water when you can write on it! Though I can see how easily it could be abused and used for advertising products in fountains and so on. As though corporations don't already have enough ways to inundate us with crap they think we might want to buy. http://blog.scifi.com/tech/archives/2006/07/24/walk_on_water_p.html