I don't know why he loves it so. It's actually cool moist air coming out. It has a blue light inside which he scrabble around trying to get, and sometimes bubbles shoot up through the tank, making him even more excited. He stayed up all night with it the first night; my husband said the next day Frodo could barely keep his eyes open... :lol:
With our old humidifier my cats loved to watch the mist come out. The same way they'll stare at dust in the sun for hours. Then we got a new humidifier that doesn't have a mist and the cats had no interest in it.