These professional quality Latex rubber molds can be used to make literally hundreds of Tyrannosaurus Rex tooth fossil replicas or choose one of our other fossil replica molds. Simply use a rubber band to hold the two halves of the mold together, pour in some plaster of Paris (or even better, our PerfectCast casting medium) and in about 30 minutes your students will have a perfect fossil replica of a tooth from the most famous carnivore of all times! The finished casting may be painted or polished with shoe polish to give it a completely realistic look. Our molds are durable and use only a few cents in casting medium per mold. This is the best way to let your students take home a piece of history. Instructions included!In addition to the Tyrannosaurus Rex Tooth Molds, Educational Innovations also offers other 2-piece, 3-dimensional fossil molds. As with the T-Rex, each mold consists of two separate halves which are held together with rubber bands during the casting process. Each mold has been created from a real fossil and is totally authentic. Your students will love them all!