After you read the above box in your text, and the accompanying "Check it out!" question, please go to http://www.zerotothree.org/, the website for Zero To Three. It contains an article by Lois Barclay Murphy from Zero To Three, "Hopping, Jumping, Leaping, Skipping, and Loping: Savoring the Possibilities of Locomotion", as well as an article by Lois Barclay Murphy and Colleen Small from Zero To Three, "Parent Information: Toddlers: Themes and Variation." The article takes "a close look at very young children as they develop locomotion".

After you read the above box in your text, and the accompanying"Check it out!" question, please go to

http://www.zerotothree.org/ the website for Zero To Three, which explores "the complex developmental and relational issues surrounding infant sleep"