

Animal studies show that constant exposure to chaotic, discordant music alters the brain's structure, says Pratt. You may want to stay away from head-banging rock, grunge music, or rap. When it comes to playing tunes for your kids, think cheerful and simple. Older kids may also enjoy a song that has a narrative they can follow, such as "There Was an Old Lady Who Swallowed a Fly," or "Miss Mary Mack." Encourage your toddler or preschooler to move to the music and express his emotions.

In the morning, play classical music (choose something pleasant and happy, such as a tinkly piano concerto from Chopin or Vivaldi's "The Four Seasons") so he'll wake up in a light and upbeat mood. Anything with a good melody will do, although slow songs may work best for bedtime and fast ones for play. Try out your favorites, or classical music (the old standby), or spice things up with Brazilian or African tunes. Let your child listen to whatever he likes, says Pratt. Is one type of music best for my toddler? "The science is in its infancy," says Gordon Shaw, a physics professor and neuroscientist who studies music and brain development at the University of California at Irvine. Some experts go so far as to say that exposure to music makes children smarter, but hardly any data exists to validate this point.
