Though few of the tricks performed here by a clown, a puppet named Noodle, and a troupe of cavorting children will mystify anyone but cooperative parents, they are all easy to do and the amiable, freewheeling tone of their presentation should make them easy to applaud. When Noodle is looking for a rabbit in a hat that has been demonstrated to be empty, the performer drops a carrot in with her other hand, ""behind the puppet, so nobody can see it,"" thereby providing Noodle with a more feasible twist on the old trick. And no seven year-old clown will have trouble showing that he can guess the color of a crayon by feeling it behind his back if he secretly scrapes a bit of the crayon under his thumbnail. Later ""Billy loses his shirt"" when his partner grabs it by the collar: ""off comes his shirt, but not his jacket,"" for of course Billy had never put his arms into the sleeves. All of this is bound to disarm skeptics even if it doesn't fool them, and Stubis' pictures help set the spirit of fun.