Resources for Toddlers and Preschoolers
Mathematical Concepts for Preschoolers
LoveToKnow.com has a nice list of mathematical concepts parents can work on with their preschool age kids. This site also includes a list of board games, online games and worksheets.
Toddler Math Activities from PBS Parents
PBS Parents has created a list of math games and activities for toddlers that use objects found in your home. Also, check out their activity suggestions for when you are out and about.