The ornamental design for a tray for toybeads, as shown and described.
FIG. 1 is a perspective view showing interior portions of the front and right sides, and the exterior rear and left sides of a tray for toy beads showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left-side view thereof; and,
FIG. 6 is a right-side view thereof.
The broken lines shown are included for the purpose of illustrating portions of the article which form no part of the claimed design.