The ornamental design for a beachtoy, as shown and described.
FIG. 1 is a front perspective view of the beach toy embodying my new design, which is simulative of a whale shaped tea pot;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top view thereof'
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side view thereof; and,
FIG. 7 is a right side view thereof.
The broken lines in FIG. 5 are included for the purpose of illustrating the bottom surface region of the beach toy that forms no part of the claimed design.