I'm in the UK. I've been given a box of old Lego bricks from when I was a child (80s). These were mixed in. I seem to recall they made a house perhaps? They are larger than Lego, smaller than Duplo (Lego and Duplo block included for size comparison). The 'studs' on top are hollow. They had clip-on wheels in the set and window-like push-in inserts. I cant find any names or identifying marks. Has anyone got any ideas what they are?
