So far off base, Hot Wheels is a huge collectible in the adult world today.
"Through the years, Hot Wheels cars have been collected mostly by children, but since the late 1990s, there has been an increase in the number of adult collectors. Mattel estimates that 41 million children grew up playing with the toys, the average collector has over 1,550 cars, and children between the ages of 5 and 15 have an average of 41 cars. Most believe the collecting craze started with the Treasure Hunts in 1995. Mike Strauss has been called the father of Hot Wheels collecting; he has organized two collectors' events each year in some form since 1986. The first event was the Annual Hot Wheels Collectors Convention, normally held each year in the fall. The convention occurred in various locations around the country until 2001, when the first Annual Hot Wheels Collectors Nationals was put together. Since then, the Conventions are held each year in southern California. The Hot Wheels Collectors Nationals rotate among cities outside of California during the spring. Strauss has also published the quarterly Hot Wheels Newsletter since 1986 and was one of the first to unite collectors all over the world. He also writes the Tomart's Price Guide To Hot Wheels, a book listing history, car descriptions and values, which is used by almost every collector to learn more about the hobby and their collection. Strauss sold his collection in 2011 and retired from the Hot Wheels Newsletter.
There are hundreds, perhaps even thousands, of web pages dedicated to Hot Wheels collecting. Collectors are seeking everything related to Hot Wheels, from only new castings to only Red Lines and everything in between."
Only the narrow minded believe Hot Wheels belongs just to to "kiddies".