Have them take a look at Intelligent Child, a Web site focused on promoting science education, in particular astronomy education.
Kids can learn about everything from the size of Jupiter to the concept of night vision.
While there are countless Web sites dedicated to information about NASA, and a fair number of sites focused on Soviet and Russian space efforts, there's little online about the Chinese space program, even as they become a major player in commercial launches, and perhaps soon human spaceflight. This site is a valuable tool for anyone looking for more information about Chinese space efforts. The Baikonur and Kapustin Yar launch sites are among the facilities discussed on this Web site. Its Web site is filled with information about the current status of bills and programs, from background issues on space policy to legislative alerts. The German Space Net endeavors to provide space news and information to German-speaking Web surfers worldwide.