A marble run set is incomplete if it doesn’t come up with marbles. So, there are no chances that you can come across such a set that won’t have marbles in it. Usually, there is a minimum of 8 marbles available in each set and may extend to any amount. The eight marbles available are enough to enjoy the best of the game. Further, in some sets, you can come across about 30 marbles in a single set. So, imagine how amazing the experience would be to play with this much amount of marbles!
Usually, you would get plastic marbles in the set. But if you desire the glass marbles, then there is an exchange factor too.