race car made with buttons and a clothespin To make one car, you need Glue Two twist ties Four buttons, preferably equal in size, and at least 1" in diameter. If you are using two different sizes, pick the larger ones for the back wheels so they are like real race cars. One clothes peg 2 short bits of a not-too-narrow straw, just a little longer than the width of the clothespin One small button