N.R.
One thing I do for my kids is I buy a Christmas ornament every year based on what they were into that year. One year was Thomas and one was Spongebob. I put their names and year on the bottom with a marker then I put them away. We don't use them. I have them stored so that when they move out they will have ornaments for their trees with all their childhood memories.
:)
We also make one every year. Those tend to be really funny. Nicolescrafts.com has some great ideas around the holidays.