If you had a good childhood, buying, opening, and collecting St. Louis Cardinals baseball cards had to play at least some part in it.
Baseball cards were invented in the 1860s but started to really become popular not long after the turn of the century as tobacco companies decided to put these cards into packs of their tobacco to boost their sales. Some players, such as Honus Wagner, were against putting their faces inside tobacco packs because he did not want children having to buy tobacco packs just to get his card. For this reason, his card is the most valuable baseball card of all time.