I've got a 3 year difference between my children.
It seems unfair to not allow the appropriate-age toys for 3+ years, just because they'd be unsafe for crawlers who put everything in their mouth. With that logic, in a large family you'd potentially get to teen years without ever having played with a toy because there's always someone younger than you to prevent it!
But it also seems unsafe to allow lots of choking hazards to be knocking around downstairs.
I've tried to think it through and can't see what people do for the best.
Do you lock toys away and only allow them out one at a time for supervised play? Seems a bit hard to police.
Do you only allow them in the bedroom? Seems a bit unfair to banish children to their rooms to play.
So what on earth do people do?