hi A.,
My son had tubes put in right after he turned 3. The custom ear plugs they made for him at the ENT did not stay in ever, and he refused to keep the other ear plugs in too, no matter what shape or color they were. I asked his pediatrician about it, and he said there were two schools of thought regarding water in the bath, the first being absolutely no water near the ears, and the second, which he said he agreed with, was that as long as the bath water was clean and precautions were taken to minimize exposure, I should not worry too much about infection. He emphasized the clean water part, meaning if he was in a lake or something that he should wear plugs. Because plugs were not an option with our very strong-willed child, his grandmother found a Speedo swimming cap online for him to use when we went to the lake. As for the bath, I ended up putting only a couple of inches in the water in the tub so that he could still splash, and cut his baths down to twice a week or so. He hasn't worn any ear protection in the bath since that first harrowing month. He's 4 now and his tubes are still in, but he's only had one ear infection since his surgery a year ago. good luck.