Last year, I made Hank this fancy box with ten chocolate coins inside, and told him he could trade each one for a new iPad game (under $5, but he only ended up choosing free ones). When he traded it in, he also got to eat the chocolate. The gift lasted for six months, because he kept forgetting he had the coins and then remembering in a fit of ecstatic glory.
This year, I got one of these <a href="http://Super Mario Bros. chocolate coin tins
Mighty Girl 