I just ordered for my son. I don't know if you remember these as a child but I loved them. They have a series for 0-3 years old, 3-6 years old and 6-12 years old. This is a great way to encourage reading while learning about animals. Your child will be thrilled when the mail comes and something is addressed to them.
They have several great deals throughout the year. Right now, they are offering a savings of 67% plus a FREE wildlife poster and animal stickers.