I wanted to be :
an author
an archaeologist
a zoologist
an air traffic controller
My daughter (who is 6) wants to be an astronaut. When she was 3 she wanted to be a primary school teacher.
My son (who is 4) wants to be a train driver...but he also wants to be Ben 10, and a dinosaur, and spiderman, and sticky boy (his own superhero invention lol).
My other son (who is 2) wants to be a train driver as well.