The Four Laws of Thermodynamics
—For Twin Toddlers

Twin toddler boys scoop the last of the chocolate ice cream

  • Zeroth Law

    You and your brother both have a granola bar, stop complaining.
    If two systems are in thermal equilibrium respectively with a third system, they must be in thermal equilibrium with each other.

  • First Law

    You’re going to feel better when you poop.
    When energy passes, as work, as heat, or with matter, into or out from a system, its internal energy changes in accord with the law of conservation of energy.

  • Second Law

    Daddy cannot put the broken banana back together.
    In a natural thermodynamic process, the sum of the entropies of the interacting thermodynamic systems increases.

  • Third Law

    It’s impossible to get it clean and keep it clean.
    The entropy of a system approaches a constant value as the temperature approaches zero.

Wikipedia: Laws of Thermodynamics