Sylvester and the magic pebble /
by William Steig.
- New York : Simon and Schuster Books for Young Readers, c1969.
- [32] p. : col. ill. ; 32 cm.
In a moment of fright Sylvester the donkey asks his magic pebble to turn him into a rock but then can not hold the pebble to wish himself back to normal again.