Do you have any predictions for what career your child will have based on their current interests? For example if your child loves swimming their career could be a future Michael Phelps.
My son (4.5) would be something that would use an alias like Batman or Darth Vader. I am not sure what the job market for those fields will like in 20 years, but I am sure he would enjoy either job.
My daughter (17 months) would probably be a dancer based on her smooth dance moves or an artist based on her work in the crayon medium.