When your grandad rings the doorbell, it's babysitting time This is a hilarious picture book about a child spending time with his grandad. It gives important tips for 'babysitting' a grandad, including what to eat for snack (anything dipped in ketchup), what to do on a walk (be on the lookout for puddles and sprinklers), and how to play with a grandad (build a pirate cave, put on a scary play).