More ideas from Hulya
This is very cool and easy math activity and found very useful to teach sorting and counting. I would pass this pin. Children will match the same color of pom-pom with the bottle color.

Instead of numbers write the color word on the bottles. Sort pom-poms by color. Empty each bottle and count the pom-poms. Then record how many pom-poms were in each bottle. Add the two colors together for addition practice.