The way to help children improve their attention span is counter-intuitive. You might think that giving children tasks that require their continued attention would help. Or maybe challenging them to accomplish long and complex sequences will help memory and cognition, improving attention span. But the current research is showing something counter to what we might think.
In fact, research shows that allowing kids to have unstructured playtime can actually improve their ability to focus on a task. In the book “Nurture Shock” by Po Bronson I learned about a kindergarten program which encourages children to choose a character to play in an imaginary play scenario that lasts for several hours. Researchers found that the children who were able to remain in character did better on later academic tests than children who were taught their letters and numbers instead of engaging in imaginary play.