Perfect - and safe - for inside homeschool rolling games, this brightly colored yellow foam ball RD4 will harmlessly bounce off furniture, lamps, and little tyke's heads while they learn counting, opposites, math facts, mental math, and more. 

4 math lesson books and 12 lessons use this item:
Math Book 1: 3 lessons
Math Book 2: 1 lesson
Math Book 3: 7 lessons
Lesson Book on Fractions: 1 lesson

This is used in pre-k, early elementary, or middle school.