My DS is very sensitive to noise and last time we were at WDW we had to get him something b/c he was just out of control. Even the echo of the stucco walls in the condo bothered him. We just went to the closest drugstore and bought him these bright orange putty kind. They stayed in real well and came with a little case and we proceeded to use that same case of them for the next year. They came in very handy. One time I finally tried them myself and found that they didn't decrease the noise level as much as I thought, but did take the edge off. This trip, my DS is now 5, I am bringing those and also bring sound muffling headphones. There were times (especially in some of the vaulted ceiling restaurant) that were really too much for him. I was surprised how noisy it was just walking along the paths in MK. Good luck to you!