I think we are out of or league- I called the hobby shop where we got it and they are going to help us. THe trains just won't cross the center piece but we are mixing old and new tracks so maybe there is some other problem. I will look into investing into the battery test. Thank you for the replies.

Hi my son needs help building a figure 8 track. He is 7 and I am trying to help him but it's not working for some reason. We have a 30 degree crossing and 21 pieces of 18 inch curved radius track and 1 retailer. He is playing with Thomas trains. Do we need 2 controllers? We noticed the trains will run on one loop or the other but will not cross over. Please help! He is so disappointed we have been trouble shooting on our own for hours but it's not working. Thanks.