Rinse the strawberries and pat them dry; set aside.
Melt white chocolate in a double boiler with butter, mixing well. Pour chocolate into a cup or bowl. Dip strawberries in white chocolate, and let them set over a baking tray lined with baking parchment. Chill in the fridge for 10 minutes.
Melt milk chocolate in a double boiler. Pour chocolate in a piping bag with a small opening. Pipe mouth and eyes.