NEVER too young!First, open the cage, play some games in front of bird cage with family!Let baby watch family interacting. OR... read together as a family. Let baby watch and observe the family interaction. Do this nightly without any expectation on baby's part. You may witness baby eventually sitting on door. It takes time and patience, always at their rate.You will know when the time is right to offer " stepup". If you are afraid, don't do it until you feel comfortable. They sense your fear.
Sophie adopted at age two, climbed down within 48 hours. Too curious! She stepped up to all of us, only because it was the next persons turn to " pop the bubble". We were playing the game trouble.We ALWAYS practiced stepup or any other training away from her cage. That is her domain, and even today, I NEVER put my fingers in anyone's cage. Nancy