Odyssey~what sort of trickery has penelope being useing against her suitors

She was tricking her suitors by saying that she would chose a husband after she had sewn a gown, but she unraveled it so she never finished

After their grandmother dies, Amy and Dan Cahill discover that they are part of the most powerful family in history. The source of this power is hidden in 39 Clues scattered around the world. Amy, Dan and other Cahills are given a choice: Take a million dollars and walk away, or compete to find all the Clues. The first Clue is somehow connected to Benjamin Franklin, but its location is a mystery.