"Fast Concrete Critters" is about a unique sculpturing technique that is particularly appealing to children because the results are immediate and permanent . The material is a common, safe, non-toxic construction cement having a short setting time. They scrape the soft formed block with a spoon or butter knife to make typical animals and the book tells how to shape details such as legs and ears. . Groups of children enjoy the competition and after two hours, the Critters are displayed for all to see and are suitable for outside use.