When my brother and I were growing up, my father always devised a series of clues and puzzles that would (eventually) lead us to our Ayyam'i'Ha presents. It was terrific. Simon and I have followed suit, supplying our own children with various clues to lead them on to their own loot. This year we noticed an especially large ability gap between the problem-solving skills inherent in an eight year old and those possessed by a fourteen year old. So we opted for silly rather than smart.
Day one saw the children challenged by a laser course. They had to use all of ther ninja skills to make their way through the yarn-lasers, retrieve their present, and return unscathed and victorious! (The photos are horrid, it was night):
Silly, we have decided, is very good indeed.