This is a really easy 3 step instructable.
Step 1: GLUE STONES
Collect some stones long and thin, and one bigger. Glue the little stones perpendicular to the big one, like in the photo.
Step 2: PAINT EYES (white)
Make 2 little dots on each stone with white waterproof paint.
Step 3: PAINT EYES (black)
Make 2 little dots on each stone with black waterproof paint
Step 4: DONE!
This thing look really nice in the garden. Source.