Today, Penelope decided that she was going to untie my shoelaces.

She tugged on the loops.

She chewed on them.

She tugged as hard as she could.

Annabelle was doing her yoga when Penelope moved to the right shoe.

Annabelle came over and offered to help.

She then demonstrated for Penelope exactly how to untie a shoelace.

That's when we found out Penelope doesn't like being shown up by her smarter sister.