VIDEO : Chris Brown Dot Daughter Royalty With Mini Models of His Cars

Now we know why Chris Brown made these awesome mini-whips ... it was a birthday present for his 1-year-old daughter.
Chris had 3 cars specially made for Royalty's bday -- small versions of his own vehicles ... a Range Rover and 2 Lambos.
The small cars go for $2,500 a pop, but we're told Chris got the hook up from JC Customz in Bellflower, CA.
Each tricked out mini-ride has leather and suede interiors, custom rims, working headlights, and a paint job to match papa's.??