Three items as per the back to school challenge guidelines: A pencil holder which snaps pencils into place and snaps to other holders. The system is expandable and rolls up for tight travel and rolls out into a bridge structure to display your full range of tools. A simple ruler with 1/4" incremental "tick" marks, incremental radius cutouts ranging from .250 to .500 and a small 0.05" hole for inserting a pencil to rotate the ruler about and make steady circles. Bringing some everyday practicality to a pencil topper the sharp edge of this topper can be used as a staple removal tool for rev1-infinity. Pencil is courtesy of 3d content central. http://www.3dcontentcentral.com/Download-Model.aspx?catalogid=171&id=207343