There were 10 in his bed and the little one said Roll over! Roll over! So they all rolled over and one flew out. There were 9 in his bed. . ."" And each time the ""little one,"" a boy in sleepers, commands the bears to roll over, another one leaves through the window -- roller skating, galloping on a wooden horse, bouncing on the currently ubiquitous ""bouncy ball,"" etc. -- until the boy is left alone in bed with his teddy bear, dreaming of the ten. Stan Mack's flat, stamped-on colors and cartoon drawings won't pass for graphic excellence, but he does add some diverting visual changes and a nice bedtime ending to the popular counting rhyme -- and the low price is something to bear in mind.