The Ponytail girls pre-dated Barbie (morphed into her actually) and were part of the post-war consumer boom of realization that teens and pre-teens were a whole new - ginormous - market to create for that came with the expansion of rock and roll to the young masses who had their parents' money to spend. Although most items produced were made from vinyl - things like address/autograph books, various cases, even dolls - these are some of the rarer tin trays that may have come with one of the very popular vinyl lunchboxes.