I usually toss, donate, sell everything that is not nailed down. However, I am hanging on to some things for my future grandchildren.
My sons Thomas the Tank Engine stuff. All the wood tracks and trains.
Our set of wood blocks.
Books-the classics that were mine when I was a kid plus a few that the kids and I read together all the time.
There are a few other random toys that I can not part with because they had so much fun playing with them.