FIG. 1 is a perspective view of the built-in toy tray for child exerciser showing the design of our invention;

FIG. 2 is an enlarged top plan view of FIG. 1;

FIG. 3 is a front view of FIG. 2;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a bottom view thereof.

The rear view is a mirror image of the front view.

The right side view is a mirror image of the left side view.

The broken line showing of a child exerciser in FIG. 1 is for illustrative purposes only and forms no part of the claimed design.