A building set unlike any other—with fun, interlocking pieces that make stacking a breeze in a translucent design kids will love! The plastic pieces feature an easy-linking, grooved design, so children can build super-stable constructions in any shape they imagine. You could even use them on a light table—for engaging exploration that really shines! Set includes 105 pieces—97 Playstix in 7 sizes & colors and 8 wheels—plus a guide with building ideas. The largest piece measures approximately 6 1/3".