The American Sleep Apnea Association recommends placing tennis balls in a tube sock and pinning them to your nightclothes to break the habit of sleeping on your back, which can cause your airway to close down, a symptom of sleep apnea.
Unlike bras, girdles, garter belts, or anything that would have elastic and be subject to a lot of wear and tear, vintage nightclothes, if they were properly cared for, tend to hold up remarkably well.
In the 19th century, however, increased prosperity and a new interest in hygiene combined to make nightclothes a necessity for those who could afford it.
The pajamas with pumpkins, ghosts and ghouls usually have an orange and black theme and can be found anywhere that sells nightclothes.
The kids might love that you wear the same nightclothes as they do (or they'll be embarrassed, which can be fun in itself - for you).