From cursing Perry the Platypus to creating his latest invention, Dr. Doofenshmirtz is a huge source of Phineas & Ferb's ...

After they hit that final, triumphant note—striking a pose, of course—Perry crawls onto the scene, acting every bit the part of pet Platypus. “Oh, there you are, Perry,” says Phineas ...

4. Fold the platypus bill in half to create a center crease and give it a bit more dimension. Then fold up the very end at the base of the bill and use bits of a glue dot to stick it to the egg.