Goggles and Spike work out how many sleeps until Goggles’ birthday. Using a calendar and the strategy of counting on in his head, Goggles shows Spike how to get it right.

Can you work out how many sleeps it is until your next birthday? Write the answer in your comment,a dn tell us how you worked it out.

MATHS CHALLENGE!: What maths did Goggles and Spike need to know to make this movie? Write this in your comments here.