Once upon a time, the three Bumble Nums Gruff went to have a picnic in the meadow. But the big horrible Yeti from under the bridge won't let them cross easily! Can Stumble, Humble, and Grumble outsmart the Yeti and bumble over the bridge? Or will they get gobbled up? Watch this Bumble Nums twist on the classic fairy tale, "Three Billy Goats Gruff," and see!