This is a wonderful busy bag that my little girl loves too do. A great addition to a busy bag collection or just a quick activity for fine motor skills. This printable activity features colors, shapes and counting!
Kids - Math Making Patterns with Lego and Egg Cartons - The Imagination Tree
Sorting Colors with Cardboard Tubes--this website has lots of great ideas for preschool fun! Could be fun with cardboard tubes and acorns and numbered baskets for a fall sorting activity.