@Melanie630 You can use the "Suitable for Parties/Events" filter in your search, it's located under the Amenities tab. See if you find something that works, but it's possible that you're using the wrong website.
The overwhelming majority of experienced Airbnb hosts do not allow parties, and for good reason - this site is not designed for them, and it doesn't have suitable deposit and insurance options to reduce the risk. Plus, the liability concerns for a group of strangers' children are terrifying.
Perhaps it's worth browsing Peerspace, a website that looks like Airbnb but specializes in event locations - some of which also have overnight options.