A highly regarded author/illustrator here enters a world of For Rabbits Only. After dark has settled over the big top, two rabbits plot and plan a one-night performance for their hundreds of fellow-rabbits in the territory. With the circus animals and volunteers from the audience on their side, the show is a thumping success. Rabbits scurry off to their burrows and again all is still. Mr. Wiese's three color, light pictures echo the spontaneity of the one-night stand. Pleasing if not exciting for the toddler clan.