How old would you have to play and since the gear is limited would wearing two jackets and two t-shirts plus two pair of pants would that be good for armor or no cause I want to get into airport more

It really depends on your pain tolerance level. For most men, 400 FPS within 25 ft isnt too bad, but I would recommend getting shot at by your kid (with an appropriately safe face mask/ goggles) to be sure, before you pay ~$70ish to have a bad time. I would recommend at least an empty plate carrier and a pair of long tactical (canvas pants ) with an underlayer. A google search or two will massively help make your airsofting venture much more enjoyable. GLHF :)

It is 13 or over to play and u can wear that stuff to the place