Isn't that what the classic memory game is for? hasbro memory game
Spades, chess, go fish, sudoku
I could be wrong, but I think working memory is the short term memory where you hold little details until you piece it together to make a decision. If that what you're working on then that's what family game night is for. How old are your kids? PBS kids has online games that are cartoon and fun but with built-in Skill boosters.
Eta:
If processing input is also part of working memory then encouraging retelling of stories could help. They Always want to tell you what you just saw on tv even though you just saw it. I should probably quit now because I don't what you're trying to work exactly. I think that's how they're enlarging their working memory, by talking outloud.
Last edited by La Texican; 06/23/12 12:34 PM.