This game is generally played outdoors but in a pinch you can play it inside. Take an undecorated white hardboiled egg and place it a few yards away from the start line. Each kid is given a unique and identifiable hardboiled egg. One at a time the participants step up to the start line and roll their egg towards the white target egg. Once everyone has had a turn determine which egg is closest to the white target egg and the roller of that egg is the winner.
Since this game is easy and quick to play it can be repeated any number of times. You can award a prize to the winner of each game and/or reward the person who wins the most games as the grand champion. Be aware that the eggs can get damaged so the more you plan on playing the more back-up hardboiled eggs you should have in reserve.
TIP: Let the kids decorate or personalize their own eggs to add some fun to the game.