From The Box:

"Time for beddie-bye! Have no fear, even at night, when the lights are off, you can play a game of Cat's Pajamas because the cards GLOW IN THE DARK!

And turning the lights on and off are actually part of the game! See if you can match the most sets of sleepy kitties. Each one has its own unique glow in the dark pattern printed on either their jammies or their blankie.

Remember to check your sheets for BED BUGS. They can creep up on you and take one of your matched pairs. And that nasty ALARM CLOCK will stir up a startle and force a re-deal that will totally interrupt your sleep!"