yes you can but it also depends on the day care center
try a doggy daycare volunteer oppertunity
No.
It really depends on where you live. It's really hard to find somewhere because most places want someone 14+ to volunteer. I'm 12 years old and I volunteer at a nursing home.
If you want to volunteer and you are 13 and over, try going to a local daycare
No you can not.
what size of what??
6'4"
Yes.
Will yes, you probably can but you would probably have to call the daycare and also it would be up to them. And if they say yes be sure you would want to work with smaller children because older ones probably would not take you seriously.
carbs and sugars
Yes all the time you get use to it
if you have hit puberty then yes if not then no but I would say yes.