Empty pop bottles,paper,tape,tennis ball or otherDecorate soda bottles with paper to look like bowling pins. Create variations of what a "good" score could be. ...knocking down least amount of pins, knocking down most, one side, certain ones, etc. Most importantly, enjoy the time together. * You can also add a little bit of water to the empty 2 liter bottles. You can also decorate them for holidays/special occasions (Put pumpkins on bottles for Halloween, you can also use a pumpkin to bowl with) Be creative!