The simplest explanation is to consider a tray with a bunch of small depressions in it and a bunch of marbles on it. When the tray is stationary, the marbles fall in to the depressions and stay there. When you shake the tray very slowly, the marbles stay in their depressions. But if you shake the tray vigorously, the marbles pop out of the depressions and go all over the place. As long as you keep shaking vigourously, the marbles move around the tray almost as if the depressions weren't even there. And as soon as you slow your shaking enough, the marble fall back in to the depressions and cannot move beyond their local depression.
"Temperature" is a measure of how vigorously the elements of something are moving around randomly. A gas which is 4X as hot has its molecules moving, on average, 2 times as fast (square that to get 4 times the energy). The depressions represent the fact that many molecules have a slighly lower energy when they are at a "sweet spot" distance from each other which is actually pretty close together, but that energy is not very much lower. It is easy to see how the marbles in the depression is analogous to a solid, where the molecules are arrayed in fixed locations in a regular lattice.
But it is not much of a stretch to see how the marbles in the depression are also aanalagous to the liquid situation. In liquid, the molecules want to stay near each other, but they can "roll around over each other" pretty freely as long as they don't get too far apart from any other molecules.
And so we have described "phase transitions," how a weak attractive force (shallow depressions) only impose their order when the temperature (amount of random motion energy) is low enough.
Superconducting Phase Transition
In a metal which is potentially superconducting, at high temperatures its conduction electrons zip around pretty freely and energetically throughout the extent of the metal. It is so much like a gas of electrons that the very useful model is called the free electron model and at higher temperatures the electrons are referred to as a gas.
But it turns out that in some metals, (lead, tin, niobium, among others) there is a very weak attractive force between electrons. This is so week that at room temperature it is completely unnoticeable. Indeed, none of the gas electrons get "stuck" in the tiny "depressions" associated with such a weak force until the temperature is around one one-hundredth of normal room temperature, around 4 Kelvins for lead, whereas normal room temperature is about 290 Kelvins and liquid nitrogen is still 77 Kelvins.
The superconducting state is more like a liquid than a solid. So the electrons have some "correlation" with each other, which is broken when they are jostled out of their "depression" by thermal bumping from other electrons.
Now what this model tells you is a way to describe falling in to a more correlated state from a "gas" state, which applies to gases condensing to liquids, then solids, it also applies to gasses of electrons condensing into a superconducting fluid-like state. What it does NOT describe is WHY that state carries current with absolutely positively no voltage drop required. That is a different (and probably harder) post!