The Museum of Science and Industry Chicago's Science at Home website is a fantastic resource for kids stuck at home. They have videos, games, and hands-on science experiments for kids to try at home with parental supervision.
One of the coolest places for kids to spend time indoors in Nashville, TN is at the Adventure Science Center. We got to visit it recently and the kids loved every minute of it.
We recently started go though the "Awesome Achievers" series by Alan Katz. In the two books so far released in the series there are over 20 featured scientists, technology experts, and thinkers. He loves them.