. . "onProjectile launcherUS6283871Aug 12, 1998Sep 4, 2001Koala CorporationParticipatory play structure having discrete play articlesUS6352478Apr 17, 1998Mar 5, 2002Creator, Ltd.Techniques and apparatus for entertainment sites, amusement parks and other information and/or entertainment dispensing sitesUS6375578Nov 1, 1999Apr 23, 2002Koala CorporationTwo-way interactive water slideUS6386538 *Aug 15, 200" . .