I never teach Jude to climb the stairs before.
Manfred was in Gymboree and hence we did teach manfred to do the stairs when he was 6.5mths old. and Manfred could climb up whole flight of stairs on his own at 7months old.
One day Jude just went to the stairs himself and started climbing.. It’s another milestone he achieved. Bravo Jude!! Somehow U r Brave and daring and everything….