Add Yahoo as a preferred source to see more of our stories on Google. A nostalgia-fueled DIY trend is bringing these magically shrinking kits back in style. Aleksandr Bushkov / Getty Images There is ...

Many people fondly remember playing with toys known as Shrinky Dinks—sheets of polystyrene plastic with shapes that kids can color, cut out and heat in an oven, where they shrink into thicker pieces ...

It’s as if the go-to analogy these days for anything technical is, “It’s like a series of tubes.” Explanations thus based work better for some things than others, and even when the comparison is apt ...