Here are two mini books from Flying Eye Books that will teach your child about shapes and what's at the beach. They're tough enough for small hands and they offer clear illustrations to help your child learn.
Flying Eye Books sent me copies of these two books to read for review (thank you). They have been published so you can find a copy now.
Shapes is a bit repetitive but that will help your child retain the right name for the shape. There are also pictures where you can look for the shape and identify it as you go along.
At the Beach was my favorite. It might be because I love the beach but it's mostly because the items are identified on each page and then you get an overall scene where you can name them all. It's a bit different from the other form and makes both books work well, together.
Here's an easy fun way to get your child to understand shapes and know the names of beach items.