This collection of hard resin, life-size bird track replicas perfect for making imprints in sand tracking boxes or for making animal tracks in wet cement or the PerfectCast® replica compound that we offer. By comparison, flexible track replicas we also offer have the "feel" of a real paw and often show more detail (skin folds, pads) than the hard resin replicas. Each of these two track replica types have their own unique uses as hands-on teaching tools.