This website has a lot of great, fun and creative ideas to help students practice place value. My favorite is the ice cream cones. Students get to build ice cream cones but matching the numbers and different ways to write the numbers.
When a student is working extra hard or participates when no one else is or answers a challenging question, they can get 'smart beads' to wear. They trade in smart beads @ the end of the day for a note that goes home to their adult[s].