Though Harry and Tuck may not always want the same thing, each twin knows the other's preferences. When one is hurt, both need Band-Aids; and they take blame together or (realistically if less laudably) accuse each other of a deed no one can pin on either. When they start kindergarten in separate classes, it's a worrisome parting (```Who will tickle me if I cry?' Tucker asked, wondering if he might be just about to''), but by day's end both have happy experiences to share. Deftly, Keller chooses incidents and concrete details that perfectly illustrate the boys' special friendship, gently suggesting that independent identities will enrich both without threatening their unity. In her simply drawn, cheerily colored illustrations, the identical boys echo each other on every carefully constructed page—until they choose to dress differently for the second day of school. Warmhearted and exceptionally attractive. (Picture book. 3-7)