Are you ready for some building fun? The 150 piece set of Playstix allows you to build a wide variety of models right out of the box, without the need for any additional or specialized parts. And, our Idea Booklet illustrates fun things to build – from a simple table and charis to a two-story cabin. Groovy Shape: Each Playstix piece has grooves that interlock when one plyastix piece is placed across another. The different length Playstix pieces are color-coded, so it’s easy to see how each model is built.