Here's a fun birthday boggler puzzle to entertain the kids! You could do these as a quiet activity after the birthday tea, setting a time limit and trying not to be too competitive!
Birthday Boggler Puzzle
This birthday alphabet challenge could make a good after-tea game, played individually or in groups - see the different ways you can play the game here. Or you could tuck one into each going-away bag to keep the children busy when they get home!
Here's a simple dot to dot puzzle that younger kids will enjoy - once they've finished joining the dots, they can colour in the cupcake too!