The only construction sticks that connect by snapping into place along evenly spaced increments on each piece. With Junior Geostix kids will improve fine motor skills, create designs, make different shapes and patterns, learn basic angle and measurement concepts and develop creative thinking skills. Includes 160 GeoStix in 7 sizes and 7 colors: blue, orange, dark green, light green, yellow, purple and pink. Sizes range from 1.25" to 5.25". Activity guide included.