My little motocross baby

Josiah just loves everything to do with dirtbikes and it makes me really nervous! Josiah called me to come watch him ride his little dirtbike in the shop and this is what I found! He has a ramp in there... it started with 1 board underneath, then it went to 2.... then 3... then 4! He's not the least bit scared either, but he sure had a blast! This isn't bad, but what scares me is thinking when he's on a "Real" dirtbike and he's really wanting to do tricks!!!