Juegos de expresión artística

The turbulent atmosphere of suburban Barcelona hides the social isolation of a juvenile misfit. A young man fascinated by private detectives becomes entangled in a strange and dangerous case of academic dishonesty.

What causes sound? How does sound travel? Sound begins when matter vibrates. Without this vibration sound could not move and nothing would make any noise. Starting with tiny molecules, this book explains the main concepts of sound and furthers understanding through a series of easy-to-do experiments that will appeal to readers of all ages.

"Descubre las civilizaciones del valle del Nilo: desde la corte del faraón a la vida diaria de los obreros"--Cover.

In Bosques, carefully leveled text and vibrant, full-color photographs take beginning readers on a tour of a temperate forest. Readers learn about this important ecosystem and the variety of living things adapted to live there.