In normal novice tournament some say 1-2 years experience. Is there some 3 year kids like the 3 yrs old that would qualify?
IMO yes, but that wold also depend on the skill level and like you said mastering moves.
There are novice tournaments like Derby Novice championship that state 1st year wrestlers only.
The state looked into try to define or "track" this some how, and it was very difficult if I rememeber.
It really comes down to parent and coaches putting the kids where they should be, and not trophy hunting in the novice division.
Keep in mind if that 3 or 4 yr old is wrestling in your club without a USAW card there is a level of liability the club, school or building is open to.
I require a card for everyone even if they just want to practice and never go to a tournament.