Peanuts, peas, cigarettes, skittles, dead hookers.

anything you find. that you have alot of. bingo chips!!!!!!!!!! if you have them!!!!!!

Learn to perform magic tricks with it, using coin sleight of hand

bottle caps, cotton balls, coins, peanuts, pen caps

I strongly suggest that you buy poker chips, which can be easily and cheaply obtained from ebay. What more, if you buy certain sets, they may come with dealer and blind buttons, decks of cards and possibly extras such as dice.
It is possible that you could use things like dried broad beans and the like, but poker chips are the right size, can be stacked and have different colors. For me, there is no alternative.
Although if you are adamant, you could just write values on pieces of circular card or paper. (I did this as an alternative use for the buttons.)

You can use buttons,but it takes time for you to look for it.. Better purchase one poker chips set, anyway it doesn’t cost you much. I had purchased one in here