With Educo Diagram Volume children can explore volume concepts by sorting images from empty to full and vice versa. This hands-on activity helps them understand “more than” and “less than” in a fun and interactive way. Helps children understand volume concepts through visual sorting. Encourages learning of “more than” and “less than” in a playful way. Features a sturdy wooden frame (34 x 34 cm) for organized gameplay. Includes 25 durable plastic image cards for interactive learning.