FIG. 1 is a front view of a scooter of my new design; FIG. 2 is a rear view of the scooter thereof; FIG. 3 is a right view of the scooter thereof; FIG. 4 is a left view of the scooter thereof; FIG. 5 is a top view of the scooter thereof; and, FIG. 6 is a perspective view of the scooter thereof. The broken lines represent portions of the article that form no part of the claim.