Lately - if the kid is bouncing off the walls and yet another 1/2 hour Wiggles show won't do it, I've been searching for short videos on You Tube. It's awesome, really, the longest clips are only 4 or 5 minutes long and most are less than a minute (just perfect for a 2.5 year-old's attention span). And you can find great stuff. I've been playing some old, Warner-Brothers-will-never-ever-release-in-DVD-ever Loony Tunes cartoons. Like this one.
So Sweet Juniper just posted a list of some great stuff on You Tube that he uses to entertain his daughter. I'm bookmarking it.