The Happy Beginning
In this episode, the boys start to build the world's tallest skyscraper. When Candace calls Mom, mom refuses to come outside, and tells Candace to knock it off.
Once the boys finish their skyscraper, Candace walks outside and bets them $1,000 that Mom won't see what they are doing. Right after she says that, Ferb walks inside and gets Mom to come see what they are doing. First, she is in shock at what the boys had built. Then she says that they did a wonderful job and offers them a slice of pie.