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Tony Ross' illustrations are action-packed, cartoony and great fun. There are plenty of giggles throughout, from Grandpa spitting out his false teeth, to the big reveal of his big circus trick. The pictures help set the jolly atmosphere of the book, and work well in tandem with the text. You don't need to be a grandparent or grandkid to get the most from ''Old Dog'', but it helps. It's well worth a look.

Grandparents and grandkids will also enjoy the aforementioned [[Elmer and Grandpa Eldo by David McKee]], as well as [[White Owl, Barn Owl by Nicola Davies]], [[Driving Down To Grandma's by Ian Whybrow]], [[That's Not Funny by Adrian Johnson]] and [[The Flying Diggers by Ian Whybrow and David Melling]]. For circus-based fun, look no further than the utterly gorgeous [[My Circus by Xavier Deneux]].