it drives me crazy when the kids don't want it, but they don't want us to get rid of it either. So I stopped asking them and now I take a box over to their house every now and then and say, "toss what you don't want, I no longer have an emotional attachment to these things". Surprising how fast it goes to the dump or goodwill.
PS. The things I do have an emotional attachment to, I take a photo of. Keeps the memory alive!