From the other room I hear: Beep. Beep. Peels of laughter. Repeat. I had to investigate. I found our two mischievous girls thoroughly enjoying the air purifier. Hey, it makes a neat beeping noise and then blows air up your nose. What more could you ask for? BTW, this is our second purifier. Sis ruined the first one at Mudge's age, enjoying this exact pasttime. Sigh.