Children will love building with Popular Playthings Playstix Mega Set (315 pieces). This clever construction toy has simple pieces that inspire kids to build extraordinary things. The Mega Set of Playstix includes more pieces for more construction fun. Kids can build a wide variety of models right out of the box, without the need for any additional or specialized parts. The set includes 300 Playstix pieces in a variety of colors and lengths, 6 small wheels, 8 large wheels, a building base ,50-page Idea Booklet and a plastic carrying case . Each Playstix piece has grooves that interlock when one Playstix piece is placed across another. The different lengths are color-coded, so it's easy to see how each model is built. Once children have mastered their building skills, they will want to explore the possibilities of the Playstix snap-and-lock feature. For ages 4 and up. Popular Playthings provides award-winning toys that encourage learning, creativity, social interaction, and good old basic fun.