I am not sure what you exactly call these but I know these are chips. The ones you see on casinos. That's how I want to interpret the given theme which is Chips. Just a very fast doodle that I made just now as my entry to the contest organized by 
My drawing uses less colors because I want something that looks clean and not too busy and bright. The green background is a personal choice and it reminds me of a casino table 馃槀
Thanks