One of four new ""Let's Explore"" board books, with unusually clear, cheery, welldesigned illustrations and suggestions for activities or interaction. Here, the title is repeated for each spread: ""...like a dog. WOOF ...like a truck. BRMM, BRMM."" In Let's Do It, different children respond to questions like, ""Can you bite your toes?"" ""Can you play peek-a-boo?""--each highlighting a part of the body. Both books would be appropriate for toddler groups. The other titles, Let's Try and Let's Play, which suggest doing things with toys or around the house--""Can you knock down the blocks?""; ""Let's try to drink the milk""--are not quite as strong but still above average for the genre.