• The eSkeletons Project - compare the bones of a human, a gorilla, and a baboon
• The Bone Zone - The Skeletal System - 
• Bones of the Human Body - This game will help you learn the names of the bones
• Skeleton Shakedown - Oops! Another accident in the lab!  Help to put the skeleton back together again.
  
• Powerful Girls Have Powerful Bones - learn about how calcium and excercise can help your bones (From the U.S. Centers for Disease Control and Prevention)
• Skeletal System - mouse over the skeleton and learn the names of the bones and ligaments
• Mr. Bones - FOSS Human Body - from the Lawrence Hall of Science (University of California) - requires Shockwave to view
• KidsHealth.org: The Big Story on Bones
• Virtual Hip Surgery - a cool site from Edheads
• Virtual Knee Surgery - Take the role of a surgeon throughout a total knee replacement surgery
  

• The Muscular System - from innerbody.com
• Muscles of the Human Body - Check out this game to learn the names of the muscles
  
• Welcome to Muscles - learn about smooth muscles, skeletal muscles, and cardiac muscles.  This site is written by kids, part of the ThinkQuest site.
• KidsHealth.org: Your Multi-talented Muscles
• The Human Body Quiz Game - Test your knowledge of bones, muscles, blood, and more!
  

THE BRAIN AND NERVOUS SYSTEM

• Amazing Brain - a ThinkQuest entry, written by kids
• The Memory Exhibition - from the Exploratorium - see a sheep's brain dissection, play games with memory, and more!
• Scientific American Frontiers - Map of the Mind - Take an interactive tour of the human brain
• Would you like to be a brain surgeon?  Try Probe the Brain , from NOVA Online - Secrets of the Mind
• KidsHealth.org: The Brain is the Boss

• Mind Over Matter: The Brain's Response to Drugs (from the National Institute on Drug Abuse)

• Your Gross and Cool Body - Everything you always wanted to know about poop, gas, dandruff, sweat, zits, snot, etc. - From Discovery Channel - the Yuckiest Site on the Internet