¿Comen hierba los tigres?

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.

Sarah es la primera persona en su familia que no ha nacido como esclava. Pero ser libre no significa que Sarah no deba trabajar. Cocina, limpia, recoge algodón, lava la ropa y cuida de niños. Y cuando tiene que trabajar, Sarah se recoge el pelo. Un día, ¡se le empieza a caer! En lugar de darse por vencida, Sarah empieza a probar y mezclar productos y acaba inventando algo mejor que cualquier champú o aceite que haya probado... Gracias a este producto milagroso, decide crear su propia empresa.

Increïbles però documentades històries de delinqüents i marginats, narrades amb una qualitat d'estil literari fora del corrent. I amb tendresa i ironia. 2a edició.

The unsinkable luxury liner known as the Titanic may have sunk on its first transatlantic voyage in 1912, but people remain riveted to its storied legend. The collision with the iceberg in the North Atlantic was not the only mistake that was made that day. In this spellbinding volume, readers will learn about the passengers and crew aboard the doomed ship and what really happened that tragic night. Historical photographs will transport them back to the glamorous era, while the narrative paints an absorbing picture of the Titanic's sad fate.