It wll be a good time to sit down with her, a sketch pad and some colored pencils/markers and "spit ball" some of her ideas. Let her design it based
on the questions you ask her.... how big, how long, what's made of..... wanna paint it or leave it rough, unpainted... OR paint flowers, birds or animals on it .... should it lock.... what should it hold..... get my drift?
Some kid's stuff have a long handle and they can pull it around on wheels.
Combine it with another toy, wagon, rocking horse, doll carriage ...?
Repurpose another item like a large mailbox, old radio cabinet, toy box ...?
In order to "fit in" when i was 5 years old, my tool box had a small baby doll inside along with the hammers and saws. I don't remember for sure, but there weren't a whole lot of boys to play with in our apartment building....... and the little girls all had dolls.
No one every questioned my "manhood" then or to this day.