Have the kids collect some smooth rocks from the yard. Wash them with soapy water, rinse and dry well.
Paint them yellow and let dry. Two coats is probably better depending on the coverage of your yellow, but one will suffice.
Now add black stripes.
Use the handle end of a paintbrush to dot on the whites of the eyes. Let the white dry completely.
Use the handle end of a smaller paintbrush (or a toothpick) to dot on the black part of the eyes.
To make the wings I used some leftover wire I had. You could use chenille stems if you prefer. Just wrap it around the tip of your finger, then do another coil right next to that one. Trim off excess.
I put mine on with hot glue, but you could certainly use white craft glue.
Set something small, like a pony bead, behind the wings to prop them up while the glue dries.