Legos! To be more specific space legos! Would follow the instructions and build what was in them and 2 seconds after I was done take it all apart and slap something together of my own creation. I have a younger brother and when I was just turning 20 or so he got space legos for christmas, and I found myself playing with them again
I also remember a similar thing called mechano or something like that. Pieces of metal and nuts and bolts. Only got that one christmas, must have been expensive. And who can forget the good old cardboard box. When the parents got a new fridge or stove then woo hoo, you got to play with the box.
When I was 6 or 7 I got a heifer calf for helping with chores and when I sold her a year or so later I took some of the money and bought a CR 80 dirt bike. My first vehicle
Not sure if its really a toy or not