Nuggets Mini-Game
Ride the mine cart through the mine and follow the signs labeled "Gold." Take the path on the left first, then take the path on the upper-left. Finally, take the uppermost path. If done correctly, the mine cart will stop in front of a video game machine, where you can play a hidden mini-game called Nuggets. The object of the game is to collect the gems, pick up the bonuses and avoid the obstacles.
Cheese and Crackers
Take the mine cart to an area that contains a one-way door. Pick up the axe. Follow the signs labeled "Gold" and ride through the mine. Stop at the pile of gold and use the axe to collect some gold. Leave the mine area and go to the boat dock. Take the boat to the stone bridge and give the gold to the bridge. Cross the bridge and find the three tic-tac-toe game boards. Click on one of them to play a game of Cheese and Crackers on that particular board. Play against the toaster in a game of Cheese and Crackers at some point throughout the game to unlock some different dialogue for the ending sequence.
Collecting Socks
Collect all 20 socks scattered throughout the game to unlock a secret alternate ending sequence. The locations of the socks will change with each game, but look for the first one in Sam's bedroom.
Kisses for Sam
Take Sam up to the tree house. Proceed through the talking doors and then click on the door located directly below Sam. A woman will come and give Sam a kiss on the cheek.