Just found these random stuff while surfing and was like oh my God.. whats that, a toddler doing wall climb... see yourself:
https://www.youtube.com/watch?v=58xVk48t4GI
There is another one :
(Give it a little while to load)
http://i.imgur.com/pudTB2x.gif
Now I wonder if they continues to practice wall climbing, they will be super strong kids when they grow up. Moreover, I am sure will be healthier than similar age grouped kids.