The only worry and it wouldn't be much if you check each game you bring in for loose paint/flaking paint. Which can fall of on floor or be picked up by small hands /pets off floor. Other then that no issue unless you become a termite and eat pinball cabinets. The only worry i have in pinball is paying to much and looking at wiring for and potential fire hazards don't need a house fire caused by my buying another project game.