Unlockable mini games
     Each  mini game is unlockable by finding a hidden icon within the
game.  Grabing  the  icons will unlock the mini game. The following is
where each icon is located and which game it unlocks

Unlockable              How to Unlock
Bale Out                Secret Room in Zuckerman's Barn
Apple Masher            Secret Room on top of the heystacks in level 3
Aeronauts               Secret room located in level 4
Water Fun               Enter the hole in the tree 
                        and search the branches in level 5
Webbing Crashers        Secret room next to the water wheel in level 6
Bounce                  Enter the hole in the tree 
                        and search in the branches in level 8
Snacktime for Templeton Enter the tires and the icon will be 
                        on the tire pile in level 9
Food Catch              Enter the tires and the icon will be 
                        on the tire pile in level 10
Bumper Cars             Ledge outside of the circus tent in level 13
Ring Toss               Secret Room outside of the circus tent 
                        in level 14
Spree Ball              Ontop of the Information Booth in level 14