4 years & up. Join In and Play by Cheri J. Meiners. It's fun to make friends and play with others, but it's not always easy. You have to make an effort and you have to know the rules - like asking before joining in, taking turns, playing fair, and being a good sport. This book teaches the basics of cooperation, getting along, making friends, and being a friend. Includes a section of discussion questions, games and activities adults can use to reinforce what children have learned. Paperback. 40 pages.