Junior bug viewer for grade P- 12th with crystal clear plastic containers have a high quality magnifying lid with built-in air holes and measuring grid.Educational Insights GeoSafari Jr. Bug viewer is ideal for ages 3- 18 and is used to teach the concepts of life science. Viewer comes with clear plastic containers, a magnifying lid with air holes, 3" jar and a measuring grid.- Age group and grade: Ages 3- 18 and grades pre school- 12th.- Type: Life science.- Crystal clear plastic containers have a high quality magnifying lid with built in air holes and measuring grid.- Size: 3" jar.- Get an extra close-up look at bugs of all sizes! Crystal clear bug viewer has a magnifying lens built into the lid and a measuring grid on the bottom.- Built-in air holes in tight-fitting top keeps bugs alive.- Sold as 1 Each..