Jack and Annie went to the tree house from their swimming class. This time, Jack and Annie went to the Ice Age. First, they went to a cave filled with bones. They found this cave was the place of cave bears, they ran away. Then, they found another cave with a golden glow. In this cave, they found some clothes to get warm. They also saw some bone flutes, plan ropes, stone axes, knives and some pictures on the wall. When Annie and Jack wanted back to the tree house, a sabertooth appeared. Jack and Annie ran away and fell into a trap. After for a while, a sorcerer pulled out of the hole and gave them a flute. They rode a mammoth to return to the tree house. On the way to the tree house, the sabertooth appeared again. Jack blew the flute, the sabertooth ran away. This flute was the third thing they were finding.