To start, super glue the two parts of the plastic egg together.

Next cut a 3 inch strip of the foam matt. Measure the circumference of the egg by wrapping the foam strip around and cutting to length. (see image)

Measure four equal steps and cut out. Connect end to end using hot glue. (see image)

Now measure four 3.5 x 1.5 inch foam matt. These will serve as the mounts. I found the best way to copy the shape of the egg is to hold just behind and follow line. (see image)

Once you have all the foam parts hot glue them all together.

Next mark out and drill eight equal holes around the egg. Screw in your flat head screws.