3 years & up. Practice architectural theories, model scales and engineering with this 60 piece Little Bricks set. Included are 10 double-sided concept cards to give ideas for specific structures. Textured TPR plastic and weighted metal interior is scaled to miniature brick size for architectural building. Build models and scenery for pretend play, stop motion videos and more. Perfect for indoor and outdoor play. The four color gradients of the bricks provide an authentic building experience. 60 piece set. Store indoors. Individual bricks measure 1.75" L x .6" W x .89" H.