Recommended Age 4 yrs. - 6 yrs. / Pre-K - 1st gr. Description Math skills really stick with our all-in-one magnetic math tin—where the lid becomes the activity board! Children just lift the magnetic lid off the sturdy storage tin, flip it over and place one of 15 different activity mats inside. Then they use the easy-grip magnets to fill in the blanks…and get hands-on practice with adding objects! You get an activity tin, 15 mats and 20 magnets. Tin measures 8 3/4" x 10 3/4". Like new and a completed set. Bundle and save, check out my other learnings materials