Hats & Diaper Covers Crochet Book- Make your baby snug as a bug in a rug with these hat and diaper cover sets. With these whimsical play set designs, your baby will be the talk of the animal kingdom. Designs include: ladybug, bunny, chick, puppy, and giraffe. Designed for ages 3 to 6 months. Beginner skill level. Use with size 4 medium weight yarn and US I hook. Pocket size book with 48 pages in a softcover.