With Valentine's Day not too far away, I thought I would share some unique valentines I made last year which combined Phineas and Ferb with one of my other casual interests, stamps and stamp collecting. Stamp collecting may be a hobby so nerdy that not even Baljeet would touch it, but I'm sure that Phineas and Ferb themselves would be impressed with what I did last year- rather than putting a valentine in an envelope, I put one on an envelope!