Used to love Meccano. It was my ambition to own a number 10 set (the biggest), but £50 was a fortune in the 1950s, beyond a paper boy's wage, over £1000 in today's money.
I did buy clockwork and electric motors though, to drive my car chassis through a centrifugal clutch, crash gearbox and differential.
Now I can afford it, it's not available! Maybe my predilection for spaceframe Moultons is a throwback to those days...