Atravel writer who often brings along her kids says these countries have something to offer for every type of family—and all ages.

How does a stripy tree snail hide from hungry birds? The Hypselostyla camelopardalis from the Philippines and Reinia variegata from Japan have both evolved a form of dynamic camouflage to survive.

Her rule of thumb: “The stronger a color is, the more stimulating it is, and the softer the color is, the more soothing it is ...