Madness string 111767

Random mermaid
It is important to not promise kids things you don't intend, or might not be able, to follow through with! But there are lots of promises in the world that come with an invisible footnote that says '*Within reason', and it is a good lesson for your daughter to learn here.
To have some fun with it, I'd probably then get one of those inflatable costumes and wear that on top. Immature, sure. But there's no way a T-Rex at the dinner table can be considered immodest.