2 years & up. This Plus-Plus® BIG 60-piece Learn to Build Set features a new kind of construction toy that involves one simple shape to unleash ideas of endless possibilities. Create colorful flat mosiacs, or work in 3-D to make more intricate builds. A perfect on-the-go STEM toy for your budding builder! Includes: 60 BIG basic color mix pieces, a green BIG baseplate and guide book. BPA and phthalate-free. Plus Plus pieces measure 2"L x 1.125"H. Baseplate measures 6.25"L x 3.125"H x 0.375"D.