These sites for kids are suitable for toddlers, preschoolers and grade school up because those are the stages my children went through.
At the moment, I've got the following up:
I will be making more lenses for kids. If you have any request, go ahead and put them in my comment box. If I have the time, I will try to find and recommend more useful sites for kids. Do check out my squidoo profile above. I promise that you won't be disappointed as there are many useful sites for kids that I have used myself. I have also spent a significant amount of time to search, write and recomment useful resources for kids.
They also serve as a good bookmark for my kids to surf online safely. If my boy wants to play games, I just open up one of my games for boys online pages for him to navigate around as he wishes. I know it is safe because I put them up myself. :) You can bookmark them too for your own use. I have done the hard work for you!
I would rather have put them all on this blog but it is much easier and less time consuming to create visually attractive sites on Squidoo.