This isn’t an activity that would be appropriate for school age children, but for toddlers and preschoolers-PERFECT!! 
Allie from Blissful Kids posted a great tutorial for making a shape sorter out of paper shapes. Helps children learn their shapes as well as recognize color and patterns.
One of the subjects that’s often covered in preschool is learning about the five senses. Understanding our senses helps us describe the world around us and our experience in it, and it’s fun to explore the senses in different ways.
What a great idea and perfect for toddlers–exactly at their level where it is simple, yet educational as well.
A great inexpensive game. Thanks