Jack and Annie were in their bathing suits walking home from their swim lesson. They saw the magic tree house, so they went to the tree house and then they found a book that was open. They saw snowy mountains in the book and they went to Antartica. The tree house went around very very fast. They saw figures and the figures were holding spears. There were tall figures and short figures and there were medium-sized figures. These were the cro-magnans. Jack and Annie climbed down the rope ladder and then they had to walk and it was freezing there and they had their bathing suits on. They went into a cave that was filled with bones and then they didn't know what it was for, so they looked in their book. They were from cave bears, but they thought cave bears were extinct. But they weren't, because in this cave they went exploring and found a cave bear. And it was alive! So they ran out of the cave as soon they knew the cave bear was alive, so then they found the cro-magnans' home. They were freezing, so they went inside and warmed their hands on the fire. Then Annie went back and put on clothes and said, "Ta-Da!" and then Jack said, "Where did you get that?"
Then, they gave their swimming things to the Cro-Magnans. Then they found lamps, so they could explore the rest of Antartica without freezing. And then they saw a sabertooth.
The end.