J.M.
Hi D.,
Like the other mom suggested, the steamy bathroom works. We also use the plug-ins which work really well and better than humidifiers in my rooms. Check for the age range though, I'm not sure if it's age appropriate for your daughter (yet). We are also a family of allergy people.
FYI on allergies: I read online (webmd or something like that) that people with year round allergies are most likely sensitive to dust mites. Okay, it's actually the poop of the dust mites... So then I did a mamasource search. I thought it wouldn't hurt to give some of the suggestions a try. Anyway, I bought pillows for the family that are made especially to keep mites out - the weave is too small - it will say on the label. Also, no more sleeping with all of the stuffed animals - just one. We've all seen an improvement most of all my daughter who now takes two daily medicines, not three. Yea! If you want more details, search mamasource for allergies.