For a less expensive route that will give you the biomes of North America AND all of the other continents besides, the Complete Set of Control Charts for the Biome Puzzles is just $25.00.
Houses of bark: tipi, wigwam and longhouse
by Bonnie Shemie
retold by Terri Cohlene
a wonderful exploration to go with this would be Birch Tree Painting
retold by Frieda Gates
a wonderful exploration to go with this would be clay modeling
another modeling option that is a lovely earthy brown is my Chocolate Play Dough recipe (PDF)
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