My assignment--to run a blackjack table( a.k.a."21"). I was surprised by how many 5th graders know how to play the game. One even asked if she could "double down". Many also knew the appropriate hand gesture to signal yours truly to "hit" them with another card. One boy got the greatest kick out of purposely busting out.
In all the years I've been helping at classroom parties, the energy level of the kids hasn't changed as the they have aged. They still want to argue about the rules of games, and take one extra prize, just like they did when they were in Kindergarten.
Sadly one thing that has changed: I am no longer taller, than any of them.