Here's some stuff you should know to clarify what's said in the video:
1) Bu is 3 years old, he's on the GFCFSF diet, and he's on the autism spectrum. He doesn't speak (yet), is very sensory seeking (except for touch/tactile), and has hypotonia, which is low muscle tone. He is getting better with all of these things, but he cannot stand or walk for very long without getting fatigued, so he is carried or strolled more than a typical kid his age.
2) Bu gets his supplements several times a day in his "juice", which is typically a homemade, organic fruit-and-veggie puree mixed with water. This is why I personally bring organic baby food pouches or jars/tubs with us to the parks.
Please comment or email me with any questions and I can either answer based on my experience, or I can find out for you. We have annual passes so if there's something in particular that can only be answered at the parks, let me know and I'll do my best to ask or find out next time we go!