Make a simple math paper plate game to help your child practice their addition and even subtraction skills. It's fun for both home and a classroom math center.
DIY Portable LEGO Kit with Free Printable Activity Cards. I like this for school, older kids can have activity cards to create planets/atoms/molecules/fractions, younger ones can practice fine motor skills.
Circle craft and learning activity
Teaching shapes through various *FREE* activities such as geoboards and shape hunts!