holes poked in the plastic top air for us to breathe just enough light filters in for ernie, eb and steve they say that when the top comes off the light's too bright to take and what you see can frighten you there's been talk about a lake and if you get to see too much you're lifted from the dirt and run right through the length of you some say that it hurts stay away from the light try to keep out of sight the one on top died of fright i sure hope the fish don't bite ...when the top comes off.