My two DC love doing the advent calendar. Last year I placed a small piece of chocolate for each of them in the wooden drawer of the advent calendar every other day. The other days each found a clue that lead them to a hidden treasure which would always be a small toy. It may sound silly but I ended up buying 24 small toys, quite expensive, and they were a bit tatty anyway. What could I do that would still be exciting and fun but would minimise waste?