Chicka Chicka Boom Boom Tree! 1. Go to a carpet store and ask for a donation of a carpet role. Cut it down to a size that fits your room. (They usually come in 12 feet). This will be your trunk. Wrap it in brown butcher paper. 2. Get an umbrella and cut out leaves to tape on the top and inside. 3. Dye cut alphabet letters to tape on the trunk.