This is suited for 4th grade South Carolina history covering the Ice Age migration land bridge theory (hunter, gatherer, farmer) for early Native Americans but can be adapted to other grades.
PDF file. 1 page. 2 to a page.
Also includes a picture of a sample Ice Age map simulation you could do with students using clay, ice, a blow dryer, and water.
Relates students to a "tropical island" problem solving activity we did in class where you have to take a human, box of crackers, parrot, and cat and get them from one island to the other safely. Google it :)
Explains what a theory is. Gives students a summary of the Ice Age. Then, has students draft their own theory of the Ice Age migration based on what they have learned thus far.
We let students use acrylic paint on brown paper bags to create their cave paintings.