Collectors Convention Designer Autograph Sheet of the Snake & Mongoose presented at the Snake and Mongoose 35th anniversary dinner event. During this event Hot Wheels and Mattel designers and guests are invited to spend time with the collectors and provide signed prints of their individual vehicle designs or graphics designs. These autograph sessions are a big hit amongst collectors with many standing in line for up to two hours at a time to have the opportunity to talk to the designers and have them sign various different items.