British schoolchildren survive hide-and-seek.
One is a hollow cylinder and the other a silly Hollander. Source (Cause I can't claim fame for Victorian era jokes):
A: By their names.
The Air Force, because its US AF.
In a bucket.
Because it hides their teeth.
Me: I love you.
A: One.
Goose Rider
The Juan who lived.
Because twins being destroyed by planes is too cliche, I guess.
The rear-view mirrors
Molly Poppins.