Care kid Directory for parents searching for care, providing child care information, quality child care services, daycare centers, nannies, au pairs, and much more. Browse Categories By Countries Arts Babies Child Care Directories Education Entertainment Family Health Media Parenting Recreation Shopping Society Teen Life Measurements & Units Home : Education : Science & Nature : Measurements & Units  Listing(s): 1. BornThinker Check out fun online games, practice telling time, or watch animated tutorials for writing letters and numbers. Requires Shockwave. 2. Metric 4 US A site promoting the metric system which argues why metric is better and English is worse. 3. Metric Conversion Tables Conversion factors and online calculators for metric and imperial units. 4. Official U.S. Time Click on any time zone in the United States and get the exact time. 5. Old Royal Observatory and Planetarium Located in London, England, this is the home of Greenwich Mean Time (GMT) and Earth's Prime Meridian, where longitude was determined. 6. Playing With Time See movies that show the changing world around you, go on an exploration of a place in time and find out what's happening behind the scenes, or check out the time-related activities in this exhibit. 7. Time Estimation See how well you can keep track of time with this fun game. 8. World Time Server This useful site tells you the current time in any location around the world. Home • Submit Site • About Us • Link to Us • Contact Us • Disclaimer • Privacy Policy Information contained herein is deemed accurate and correct, but no warranty is implied or given. © Copyright Carekid.com Inc., 2007. All rights reserved. Care kid Directory, Resources for parents, child care provider, includes child care services, day care centers, daycare products, child care referral service, in-home care, nannies, au pairs, elderly care, and much more.