ISAAC [seeing the bishop in church]:  Can he move only diagonally?

DADDY:  How did you get so rich?
ISAAC:  Well, I've been saving since I was five and three-quarters.

DADDY:  Dylan, what is i squared?
ISAAC:  Negative one!  Negative one!  Negative one!

Dylan:  Once we've left the EU, will our bananas be lots of different shapes?

 Dylan's eighth birthday party.

On holiday to France and Spain, Isaac rode a bike for the first time, beat Daddy in chess, and read 30 pages to himself at night.

ISAAC:  When will you be dead?
MUMMY:  I don't know.
ISAAC:  Estimate.

Isaac:  When was the first day?  How did all this stuff come around us?