PLB 0-688-16259-2 Time is relative, as Griffith’s pleasingly droll story makes clear, especially when a cat, a dog, a turtle, and a couple gnats get together to compare longevity. The dog, Alex, has made a cake for his friend, Robbie, a boy turning ten who never appears in these pages. A cat notes that Robbie’s years equal about 70 of hers, while a turtle figures that the same number equals about 8 of his years, because he can live to be 100. Two gnats buzz in to check on the doings, and they can’t even begin to comprehend the very notion of ten years—“ ‘Well, they’re gnats,’ said the cat. ‘Ten years to a boy is one billion years to a gnat.’ “ As Alex tries to determine how many candles are needed for each new configuration, the cat sniffs the cake: “This seems to be made of dog biscuits,” and the higher mathematics are put on the back burner while some sheer tomfoolery comes to the fore. This is a delightful exploration of dry humor and number-juggling, accompanied by some elegantly funny artwork. (Picture book. 5-7)