With the Glowing Pattern Builder, kids create a twisting, turning, glowing kaleidoscope powered by STEM skills! This glowing Gears! building set helps kids learn cause and effect, early engineering, and more as they design, test, and twist their own glowing patterns. Compare patterns in light vs. dark for added observations. Compatible with all Gears! sets, it's perfect for STEM and creative play. Size: 27.5 x 25.5 x 8 cm. Ages 2+.