From Rylant (Dog Heaven, p. 951, etc.), a fourth pairing of good-natured Mr. Putter and sidekick Tabby. The old cat has a cranky tail that's too stiff to swish and the old man has cranky legs that can't get up a ladder. Unable to get to his juicy pears for some yearned-for pear jelly, Mr. Putter rigs a slingshot out of underwear elastic and``ZING!!!!!''fires off a fallen apple. Instead of knocking a pear off the tree, it whizzes over his rooftop and out of sight. Delighted with his ``jiffy arms,'' Mr. Putter forgets all about the pears, and zings into the night. The next day, neighborly Mrs. Teaberry reaps an unexpected bounty (``I don't even have an apple tree!'') and surprises Mr. Putter with feast of apple preparations. A funny, easy-going beginning reader, with quirky, always affectionate, cartoons. (Picture book. 4-7)