No doubt kids are fast learners. If they are taught something using pictorial aids they will super fast learners. This cool website has just used this trick. What makes this site stand out of others in this category, with amazing animated images, facts on astronomy have been explained with ease in this site.
Go to kidsastronomy.com
Introduce this site to your kid and see their face expression while they explore into various topics covered succh solor system, outer space, deeper in space, How big is the universe etc.
You can travel to the depths of the Universe and learn about deep space in one of the sub pages of this site.
Ultimately, children could construct their own solar system. This simple flash tool keeps the kids thinking and also make them remember the various constructs of this solar system.