Parents know there are plenty of Web sites where children can waste time hone their fine motor skills playing games. But what about sites that actually teach kids something? They're out there, and here's proof.

Spelling City caught our eye because it's a nice departure from the typical shrill, flashy Web sites and doesn't rely on talking iguanas or silly voice-overs. It's got a bunch of different ways for kids to test their spelling chops, including interactive games, printables, and a tool that speaks any words kids are unsure how to pronounce. Spelling City has more than 25,000 words in its database but visitors can also create and save word lists of their own. C-O-O-L.

Timez Attack is one of the best free downloadable math games we've seen. A cross between Quake (without the violence) and Myst, players must solve multiplication equations to defeat monsters and get around the cave. Since most of us around here have already mastered our times tables, we tested the game on three kids, who declare it "awesome."

Starfall is a popular Web site for new or struggling readers. It uses Flash-based movies and interactive games to help kids learn phonics, vowel sounds, and other reading basics. In addition to word recognition, Starfall also teaches kids to read with tone, inflection, and expression.

Since there are about 70 gajillion educational sites out there, it was hard to narrow it down to only three. Parents, what are some of your favorites?