4 years & up. These Insect X-Ray and Picture Cards present three different views of your favorite insects and arthropods: top, bottom, and inside. Use these cards to educate children about the many different types of bugs and their features. Have children match all 36 insect X-rays to their corresponding double-sided card. Encourage children to explore each card. For extra learning go over the basic features of bugs such as the head, thorax, or antennae. Each picture card measures 4" x 6".