Axel's new words

Tonight as the tub was filling up for Luka and Axel's bath, Axy looked at it and said (unprompted), "Bubba" for all the bubbles that were filling it up, and he said "aught" for "hot". Then, we kept asking him repeatedly to say those words and he thought that was great and smiled while he said them for us several times. He was kind of shy, but repeated them for us and we all had fun laughing together.