When I was little I really liked cardboard boxes, to make things with. And I loved playing with blocks, Lincoln Logs, marbles (we made marble runs & stuff with this awesome '80s/'90s toy Mom found at a thrift store, called a "Marble Tube Track." That's it. That's all it said on the box but it was this thing you could build a custom marble run with.)
I liked HO scale trains as well.
And Matchbox cars. I think I still have a few Matchbox cars because you don't just throw those away.
Dad's keys were fun too, and the dog, and shovels, and whatever else.
We were on a real budget & didn't play much with the latest toys but we had a ton of fun with what was around; Mom & Dad encouraged my kid brother & I to use our imaginations which we had plenty of, and it was great. I also really loved stuffed animals & such. All toys had names and personalities & backstories. It was decent!