Learn simple addition, subtraction, counting, skip counting and number properties with this durable "pop and learn" number track. The double-sided bubble board features numbers 1-20 printed on the front and blank bubbles on the back. Learn simple addition, subtraction, counting, skip counting and number properties. Interactive bubble board with 20 pop bubbles. Includes numbers 1-20 on the front side and blank bubbles on the reverse. Engaging for all children. For ages 5+. Age: 5 years/Grade K