It's a sequential discovery puzzle that requires more then 15 steps to get the lock open.

Difficultly: 8/10

It was a hot and dusty day in 1883. The wagon of the Morgan McGee family was exhausted and hungry. As they pass along the wagon trail, they see piles of people's lives that have been tossed to the wayside - items left in the dusty path to lighten the load for the struggling horses. The McGee family began rifling through the heap, hoping to find something that would help them in their own journey. Among the strewn chests and luggage, pots and pans, blankets and china, nothing was helpful. Little Johnny, however, found what looked to be an ornate chest with a strange wooden lock on it. The lock had 3 different gears. He pulled and tugged, but it just wouldn't budge. In his desperation and haste, he grabbed a stone and hit the lock, fracturing a gear. Now will the McGee family ever be able to open the chest and see inside? Help these pioneers solve the mysterious lock.