Aus dem Haus wird eine Maus

This is a kind of spelling Bingo. One game master holds 24 cards with pictures and a single letter. The other 24 cards have words and are evenly dealt to the other players. The game master then reads out one of the letters. The player who can use that letter to transform one of his/her word into the word of the picture from the game master's card can claim it. The first player to have transformed all of his/her cards is the winner.