Depending upon what you were planning on putting out and how they were to be displayed. If being laid flat, could use a shallow shadow box with hinged lid and lock and cut thin, open cell (or possibly closed cell) foam and wrap with velvet cloth of a color that would show off the coins, tokens, etc. the best. Maybe deep red or black for silver coins or white for copper, etc. and just fill them where you want them and trap between the velvet/foam and the top glass of the box and lock to hold in place. If tipped up or turned vertically, they may all slide to the bottom. The only way to stop that might be cutting out slots and pressing them in using some sort of flocked or similarly treated cardboard or artboard to hold the items in place. That would mean cutting a place for each one. Could be fun or work, depends on how you look at it. Good luck and let us know what you end up doing. Note, My uncle did something like this with my Grandfathers' Army medals. Unfortunately the display has gone missing since his death so no idea who has it.