In the spiral-bound Barnyard Babies by Kate Davis, illus. by C.D. Hullinger, an addition to the Tumble-Block Book series, youngsters can exercise their problem-solving skills by arranging the nine six-sided puzzle blocks included to form different pictures of barnyard animals. A baby animal searches for its parent on each of the six spreads, and each finished puzzle reunites parent and offspring. ( Apr.) Copyright 2001 Cahners Business Information.