Activity Idea Place: This page lists 150 quick science-related activities to do with young children.
Preschool Rock: This fantastic site has literally thousands of well organized ideas for preschoolers and toddlers. Its topics include crafts, activities, games, education, fitness, and more.
Katie’s Nesting Spot: Katie used to be a teacher; now she’s a stay-at-home-mom who teaches her preschool daughter. This is her personal blog. It includes great ideas for crafts and learning activities for preschoolers.