Build whatever comes to mind with this Playstix construction set. Kids can create imaginative structures or use the suggested projects included to help kick-start building. Grooved pieces allow for simple stacking and shape formation. Building structures provides a foundation in STEM skills. Recommended for children ages 4 and up. Includes an idea booklet and 150 pieces (28 yellow 28 light blue 30 purple 22 red 15 dark blue 11 green and 16 orange).