JrBoggle
Each player searches for words that can be constructed from the letters
The original boggle is a very nice game, but that's no reason to stop there: arbitrary grid size, multi-language, letter frequency corrections and a host of other possibilities promise you won't believe what time it is already.
Each player searches for words that can be constructed from the letters of sequentially adjacent cubes, where "adjacent" cubes are those horizontally, vertically or diagonally neighboring.