A site that guarantees to make your child a genius has a lot of promises to live up to. MakeMeGenius.com is filled with videos that cover a variety of subjects, such as physics for kids, photosynthesis, the nervous system, solar system and electricity. All of the videos are kid-friendly and will keep even your youngest children interested from start to finish.

CoolMath calls itself "an amusement park of math and more." Children can play online math games that help them with addition, subtraction, multiplication, division, decimals, money and more. CoolMath is geared toward ages 13 and up, but sister site CoolMath4Kids.com is appropriate for ages 3 through 12. CoolMath-Games.com includes math games for preschoolers.

When a mom mention she's looking for some great educational websites for her kids, it's not long before Starfall.com is mentioned. The site has been online since 2002 and works with your children through letter recognition all the way through to reading plays, nonfiction and comics.

Younger children will love everything about Sesame Street's online home. They can choose from hundreds of the show's video clips and play games that help them learn letters, animal sounds, rhymes, colors and more.

Each of the educational shows your children watch on PBS have their own learning section through PBSKids.org. Try sing-a-long songs, sorting and counting games, watch videos and more.