My dad would set up these awesome toy train tracks in the living room while I was asleep. His builds were orders of magnitude better than what my brother and I could do as 3 and 5 year olds. We'd wake up to a huge new layout every once in a while. We played with those trains nonstop for days. They were awesome.

I asked him about it recently, and he apparently has no recollection of doing that lol.