We went last September and for the first time sat in the lower level, since the crowd was so small they didn't even open the balcony.
We we WAY in the back, maybe the last row, all the way to the far side as you walk in. There's a wide walkway back there and we saw a few parents with small kids take them back there and let them sort of move around. The show is so loud and fast paced we didn't even hear the kids, but it seemed like a great place to take them if they get too antsy in the seats.