Cool! This reminded me that that my kids and I buried a time capsule in the back fill of the retaining wall we put in 2001. Hopefully, it's still near the top. I forget what they put in it but it's all inside Tupperware. We'll dug it up before we move in 10 years or so.
Something else we did over the 30 years we've lived here is put a current picture of the kids in the walls anytime we had an opening. There's one in the kitchen from that remodel, in the house addition and one behind the drywall patch from my son's Kung Fu kick. I guess there's 7 or 8 throughout the house. I don't know if anyone will find them but maybe... Lisa