The 150 piece set of Playstix allows kids to build a wide variety of models right out of the box, without the need for any additional or specialized parts. An Idea Booklet illustrates fun things to build, from a simple table and chairs to a two-story cabin. 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.