She tested several materials before finding the right one. She used a 3-D printer to produce the fake egg. But it still didn’t look quite right. In a real egg, the yellow yolk almost shines through the thin, white shell.
Williams-Guillén knew she needed help. So, she contacted Lauren Wilde, a special effects and makeup artist in Los Angeles. Wilde took the printed eggs and sanded them to make them smooth. Then she applied coats of paint and glue to get the right color.
From the outside, the fake eggs look almost identical to real ones. But on the inside, the fake egg is packed with the kind of electronics you might find in a cell phone. They connect to the internet. They reveal the date and time that the egg is at a certain location.