Attempt to gain unauthorized access to Math Playground, other accounts, computer systems or networks connected to Math Playground, through password mining or any other means. </li> <li> Use any robot, spider, site search/retrieval application or other manual or automatic device to retrieve, index, "scrape," "data mine" or in any way gather Content or Materials from Math Playground or reproduce or circumvent the navigational structure or presentation of Math Playground. </li> <li>