Jack and Jill get plenty of exercise toiling up and down that hill in this considerably extended version of the nursery rhyme. The well, it turns out, is guarded by a crocodile who won’t give out water—but will grant wishes in exchange for a hearty meal. Off go J & J to earn a ham from the butcher. Though Jill’s canny wish for a plumber to fix the broken sink back at the house backfires—“ ‘First,’ he said to Jack and Jill, / ‘I’ll check your pipes for leaks. / With any luck, I’ll have it fixed / in just a couple weeks!’ ‘Weeks?’ ”—her second try changes the croc into her disappeared Dad, who promises to fix the sink right after lunch. Doll-like figures with big blue eyes adorn Kirk’s grainy colored-pencil scenes. The bandwagon’s getting crowded with folklore takeoffs, but this deserves a spot on board for its faintly surreal air. (Picture book. 7-9)