Cut up a variety of felt pieces in different colors and shapes. I started with white squares and circles, blue squares and orange circles. I used a plain black piece as a board. (You could attach it to a piece of cardboard for a sturdy playing surface.)
Felt is not too expensive and I use it for a lot of DIY projects. I adore the color options in this pack: (affiliate links)
More early math activities:
- Math quantities craft
- Montessori triangles. You can make them yourself and they are much cheaper!
- Make your own puzzles. Some great ideas for toddlers and preschoolers.
- Shape activities for preschoolers
- Cookie fractions