Why place a preschool and a nursing home near each other?
Here's the best neurology. When the wisdom of the elder and the wonder of the child collide in a joyful space, you dump in the pain-killing pleasure drugs (Dopamine, Serotonin, Oxytocin, etc) and wash out the stress hormones (cortisol, cortisone, etc.) And you add the neurotransmitters Epinephrine (a.k.a. Adrenaline) and
Norepinephrine (a.k.a. Noradrenaline), with wake you up to even more joy, dilate the capillaries for more blood flow to the brain, and reduce the threat of strokes, cardiovascular disease, ulcers, blood clots). By reducing Cortisol, you also get better sleep, have less wrinkles, get rid of belly fat and have a better memory.
All in all, you reduce medical expenses, multiply joy, and create a world where people don’t lose all their marvels (sic!).