I found some earplugs that could be used on babies at Target but I think there was a minimum age of 12 mos. as you have to be careful about putting things in babies ears. I can't remember the brand name now, but I remember they were orange and there was an adult version as well. Thankfully we never needed them as our ds loved everything and the noises didn't bother him. (The trip before when he was 13 mos, absolutely everything bothered him so I bought the earplugs just in case - what a difference just a few months makes!). Sorry I couldn't be of more help!