You're never too young to be lostalgic

Watching the great film, Santa Paws. Vivian points to the TV during a seemingly sad-ish scene in an old toy store and says, "That place is lostalgic, right?" I replied, "Yes" with a small smile (I think a smile she can identify as my thinking she said/did something cute -- a word she hates to be called). Vivian smiles back and says, "I can say lostalgic because I'm three."