In the spring, the pets place their eggs at the foot of a great evergreen tree.
In the summer, the shade keeps them cool.
In the fall, the leaves cover them, hiding them.
In the winter, the warmth of the tree keeps them from freezing.
On December 17th, the eggs hatch, and the pets are placed in a box.
That night, at rollover, everyone takes 3 pets from the box.
In the spring, the pets place their eggs at the foot of a great evergreen tree.
And the cycle goes on.