Bob makes a deal with Mrs. Dabney that if he chops down their tree that blocks her sunlight, she will keep her barking dog in her house. The tree, which houses PJ and Teddy's childhood treehouse, has sentimental value, so they stage a sit-in protest to prevent it from getting chopped down because they want Charlie to experience it, and Gabe and Amy join the strike. But Bob wants the yapping dog in the Dabney house permanently. But when Mrs. Dabney reveals the dog isn't hers and she's watching it for a neighbor, they launch a water balloon at her.
I thought this was one of the best episodes of Good Luck Charlie. It had all the family love in this, and it was great. There's one thing that bugged me, which was how did Amy get into the treehouse so fast? Maybe the time difference between the lunch scene and the water balloon fight was about 5 minutes (since Bob would be preparing the balloons).