More than 250 big Fabergé eggs, some created by famous artists and designers, are on display all across the five boroughs of the city. You can participate in the hunt by using a free smartphone app that allows you to check in at the egg sculptures you find. Participants will have a chance to win jewel-encrusted Fabergé egg pendants valued at $30,000 and $48,000. The egg hunt runs for three weeks. All the eggs, which are more than 2 feet tall, will be displayed at Rockefeller Center from April 18 through April 25.