The built-in scales help you measure your field specimens animal, vegetable or mineral. Our Pop-up Essential Field Guide fits in your pocket and pops up to provide handy information while on the trail. 3 rugged, all-purpose, and high-strength carabiners let you attach plenty of extra gear to your Backyard Safari Field Cargo Vest. The 10 x 30mm optics of the pocket spy glass lets you keep your distance yet still have that up close and personal view. The essential field magnifier is the right tool for up-close examination. Recommended age: 5 - 12 years. Dimensions: 8" x 13" x 10".