Michelle at Scribbit uses fridge magnets for a higher purpose:
When my oldest was five I used our refrigerator magnets to showcase a Word of the Week. With the definition nearby on an index card the idea was to reward her for correctly using the word in a sentence. "Provoke," "jovial," "morose," "taciturn," "agitate" — we focused on adjectives expressing emotion or nouns and verbs that had easy synonyms that she already knew. I gave out M&Ms for correct usage.
I knew it was successful when Grace came home from school and I asked how her day was she replied, "Not good Mommy. I am morose."
Surprised and trying not to laugh I asked, "Why?"
"Because Hayden provoked me again."