The toy that allows you to build the ordinary and inspires you to build the extraordinary. Are you ready for some building fun? The 141 piece set of Playstix allows you to build a wide variety of planes and vehicles right out of the box with the included specialized parts. And, our Idea Booklet illustrates fun things to build - from a simple plane or car to more advanced versions. Each Playstix piece has grooves that interlock when one playstix piece is placed across another. The different length Playstix pieces are color-coded, so it's easy to see how each model is built. Once you've mastered your building skills, you'll want to explore the possibilities of Playstix unique "Snap and Lock" feature. STEM Supporting. Open ended play with suggested projects included.