I have found out the best spring crappie bait! At least were I fish for them (south west Michigan). It is a very small ice jig with a wax worm on it. In the spring fish like smaller jigs and in the fall they like larger jigs.
Barb I looked online and cannot find it. I bought it at Gander Mt. sporting goods in MN. They also use it for Ice Fishing Crappie. It comes in a individual little plastic tube and the best one was pink Pink Crappie Monkey and the next best on was the glow in the dark version. It had fat short body with 2 long arms. If I run into them I'll let you know.
As QuincyFisher said Crappie Thunder seem to be one of the best baits for crappie. Obviously minnows are really good too, but as far as artificial Crappie Thunder. There is this new bait out called The Crappie Magnet that can only be bought at WalMart. People here on the BOC say they work great. I bought some, but havnt had the chance to try them out yet. I know my friends have caught a few crappie on them. Good luck.