Pop bubbles on the number line to learn simple addition, subtraction, counting, skip counting and number properties with this durable ‘pop and learn’ bubble board. The double-sided board features a number line with zero to 20 printed on the front and blank bubbles on the back. Learn the concept of number lines with simple addition, subtraction, counting, skip counting and number properties.Details:Beige with numbers17" x 2" x 0.5" approximate sizeLines printed from 0 to 20Helps with simple math, subtraction and moreSuitable for ages 5 and up