This is pretty crap but here it is:
1st kid:Mummy why am i called Rose?
mum:Because a rose fell on your head when you were a baby.
2nd Kid:Mummy why am i called Daisy?
Mum:Because a daisy fell on your head when you were a baby.
A spastic Kid walks in:
Spastic
Tries to say)Why am i called Cuboard.