Safely intrigue toddlers' curiosities with this 15-piece set of smooth-sanded, nature-based Toddler Branch Blocks! Children can explore size and shape relationships through simple builds using the oversized boards, wood cookies and branch shapes in this set. Made from authentic fir branches, these pieces can be used during stacking, sorting or STEM activities indoors or outdoors. Store indoors in a cool, dry place out of direct sunlight. The largest piece measures 5cm Diam. x 15cm (2" Diam x 6" H). The smallest piece measures 4cm Diam. x 4cm H (1-1/2" Diam x 4cm H).