"I mean, I don't know how big it is exactly," she admitted, since Nina had let the guy selling it get as far as 'unicorn bouncy castle', clarified that it was, yes, a thing people could go into--and the guy had confirmed it was big enough for adults to jump around in--before she'd decided she'd needed it. Desperately.

"Maaaaaaaybe it could fit the bus," she mused. "Or maybe there's some spell to make it bigger................."

At least, like, they didn't have to use it immediately. The bouncy castle would not go bad.