Adults are always asking little kids what they want to be when they grow up because they're looking for ideas.
I used to be a member of Science Club when I was in elementary school in fact I was the secretary of the club. My childhood dream was to create a robot (haha!). In high school, I was selected by my teacher to participate in Science Fair together with two other students. My group created floor wax out of okra leaves. I'm not sure how we got the idea but it was a complete failure and we ended up adding paraffin wax to alter the viscosity of the solution. Of course we did not win (and thank goodness we didn't) but it was a lot of fun. I hope my science teacher didn't notice the foreign substance.