Curious Minds Busy Bags Geometry Snap Together Sticks with Compass and Activity Guides - Common Core Math Manipulative - Hands on learning math for elementary students Discover plane geometry hands on with these plastic snap together sticks. Children can create different shapes and explore perimeter, area, angles and more Set includes 80 sticks in 8 different lengths (color coded), 2 connecting protractors and 24 double-sided activity cards for geometry lessons. The protractors are pegged allowing the sticks to be connected so you can slide and study different angles. Sticks are sized from 2.5cm - 15cm long Activity cards give elementary and middle school geometry lessons that meet common core math standards.