When I was a child, I wanted all sorts of things for Birthdays and Christmas. Toy robots, cars, beading kits, a toy sweet shop, a pony, a gypsy best friend. I got most of them in some way after much wheedling (my mother vetoed the Romany, who had moved in next door), but one thing that I asked for I nearly always got. Lego.
I *loved* Lego - making houses, farm animals, dinosaurs - and always with the challenge of limited shapes and limited bricks. When my little brother came along, my Lego got added to his, and we played together, his Castle, Space and Technics Lego added a certain je ne sais quoi to the little hamlets and vehicles we built together. (My brother, by the way is now a senior manager for a bus company.)