While you were out, your childminders have been entertaining your offspring with dry ice experiments. You're that sort of parent, with those sorts of friends. On your return, you discover that this has gone down very well with junior, and that there's some solid CO2 left over. What could be better than to continue the science fun in the morning? All you have to do is keep the stuff cool overnight. Simple enough? Perhaps not. (Previously)
The King of Random shows us how to make sparklers, shaken butter (that you can turn into a candle), instant ice (tutorial), and melting metal with microwave parts. [more inside]
Got some dry ice? Got a swimming pool? Well, what are you waiting for? Inquisitive dogs will be confused! Start with a small chunk. Next, take a 60-pound block of dry ice and kick it into the jacuzzi. Okay, so you're looking for more of a thrill? Try a dry ice depth charge! (If you don't have a pool, a frozen lake will do.)
Walking on liquids, corn starch rocking out to the beat of a subwoofer and materials that expand as they stretch are just some of the cool videos mentioned in The Stuff of Dreams (plenty more links in the last link).