You are welcome to use spare coins or buttons as markers when playing your custom bingo game.
If you would like to make your own markers you can use these templates:
Canada
Day Markers
(Maple Leaf)
Fourth
of July (USA)Markers
(Red, White & Blue Star)
Ladybug Markers
(thanks Kimberly)
Pokeball
Markers
(thanks Barbara!)
Cut these markers out after printing them. To make them sturdier you could paste the page to cardboard (from a cereal box) before cutting them out.