Button Sorting Cups (and link to other color sorting games) - What a brilliant idea for your toddler/preschooler! Adding this to our collection of activities to promote fine-motor skills and color recognition!
minus the toilet paper rolls! --Color Sorting using toilet paper rolls and popsicle sticks. This website has a TON great preschool learning activities. I would change it a little for Kinder sight words
Color of the week series on Play Create Explore. Exploring one color a week for 11 weeks of fun color themed activities! Lots of Yellow sensory bins, activities, and ideas for exploring the color yellow with toddlers