Busy hands build strong minds! Learn about Human Skull with this fun 4D puzzle! Model has colorful parts to show the different bones. Challenge your critical thought and mental acuity. Build dexterity, fine motor skills and problem solving skills. Reinforce learning through hands-on exploration!Features include:– 3.5″ model with 17 pieces.– Illustrated assembly guide included.– Learning guide included with the description of the anatomy and how a human torso works along with some fun questions to test your knowledge!– Ages 8+