All shapes and sizes, snap the pieces together Lego blocks.
So sung, Glass domain back in 1991. We had the bigger, Duplo blocks as a child back in the early 80's, along with a Dukes of Hazzard Playset and a Snoopy school bus (complete with Lucy and Charlie Brown figures). But its Lego that I came back to. We had a space set as a kid and a fire station set too, complete with astronauts, Lego firefighters and another set which had Percy pig with a wheelbarrow.
I still have Lego on my main desk, a space plane remade now and again, and added to whenever we have new bricks. In fact we never had Lego at school though we did have a substitute. Polydron.
Though their site at the moment seems to be knacked, Polydron was a triangular based (and looking at other sites, had hexagonal and square pieces too). You got to play with it at school only on special occasions possibly as part of maths class, we remember making spinning tops out of the triangular pieces (and them falling apart at the slightest touch). I hadn't thought about it for a good 20 years, till we, talking with my parents over dinner, the topic came round to old toys.
Its funny what you remember and what you choose to forget.