We need more farmland for a growing population, but the space doesn't exist. So what's the solution?

Remember how great Lincoln Logs and Erector sets were? It was one of the best gifts to unwrap at Christmas. They still are after half a century; you can buy them because they're such perfect ways to fuel a child's imagination.

Established therapies such as cognitive-behavioral therapy can address distorted, negative thinking and can be extremely effective for disorders like depression and anxiety. But the demand for these treatments exceeds the resources available. New innovations are sorely needed to fill the gaps, not to replace existing models of treatment, but to extend basic practices of mental well-being to the general public.