https://en.wikipedia.org/wiki/Trading_card
A trading card (or collectible card) is a small card, ... Digital collectible card games were estimated to be a $1.3B market in 2013. ... Launched by Topps in the 2007–08 season, Match Attax, the official Premier League trading card game, is the best selling boys collectable in the UK – with around 1.5m collectors in the UK – and with ...