Construir un patio de recreo (Building a Playground) (Figuras Tridimensionales) (Spanish Edition)

There is a contest at a school to design a new playground. The students use blocks to build their models. As they build, they use three-dimensional shapes. Some students build a train out of blocks for the younger students to play on. Can you guess which three-dimensional shape they use for the train's wheels? Read to find out which design wins. 32pp.