I also noticed the World of Science is going out of business! :( That's such a cool store. Although, I've never bought anything there. That's probably why they're closing... everyone says that. :) As Mike said to me at work, "It's like a science museum but they expect you to buy the exhibits... nobody wants to do that, they just want to play!"
So, everything is 20-40% off there, so I picked up a box of colored polish rocks, normally $8, on sale for $6. :) Once I get the stuff to make my fountain, I might use a few of them in there.