Discover the beauty of seashells inside and out with Shell X-Rays & Picture Cards! Examine real x-rays of a wide range of seashells, coral and animals to see their inner structures. Look at the printed cards to see the outside structure, color and design. Lay the x-ray over the card to see how the inside and outside go together for an easy science project. The cards are 4 x 6" (10 x 15 cm). Includes guide. 36 cards and x-rays. Ages 4+.