One Is a Snail, Ten Is a Crab: A Counting by Feet Book — April Pulley Sayre

Now a Big Book! What do one hundred sunbathing snails have in common with ten crabs in inner tubes? Check out this mirthful counting book with a focus on feet.

If one is a snail and two is a person, we must be counting by feet! Just follow the sign to the beach, where a bunch of fun-loving crabs, lounging dogs, gleeful insects, and bewildered-looking snails obligingly offer their feet for counting in a number of silly, surprising combinations -- from one to one hundred!