Great idea for teaching toddlers colors and counting! (from Sew Fantastic) Considering Cash may be color challenged, need to do these kind of activities with him. Need to wait until he stops putting Pom poms in his ears though.
Match shapes to outlines on cardboard. You can extend this by sorting the shapes or talking about the different attributes of shapes. You can even use the felt shapes to combine and make new shapes and objects once your child is older.
Pom Pom drop. Teaches sorting by color AND size and is suitable for toddlers months. May be simplefied: one year old will enjoy any pom pom drop and months year and a half old pre-toddler can start by sorting by color OR size one at a time.