Judging = getting easy (and hard) tasks out of the way first and then being lazy.
Perceiving = procrastinating and creating new tasks/projects until you've got enough stress to actually fulfill them.
I remember being really frustrated when I was with my cousin.
Me: "What are we going to play?"
Cousin: "Nothing." (She wanted to rest)
Me: "But we have only four hours of playing time! We can't just idle that away!! Why don't we bake a cake? Why don't we make a marble labyrinth? ... Why do I always have to nag you for three hours before we can have fun?!"
I never really understood that last one... I can understand that people have to nag because you don't do your work. Work is boring, so you need the nagging. But play is fun - everybody should say yes from the first time when you are allowed to play, no?
Playtime = time to be active! Why would you do "nothing" when you actually can do everything you want? And no, "resting" is not something you'd possibly want to do (*). That's something you need to do sometimes - but as little as possible...
(*) Now I know better. There are people who see 'resting' as a valid way to spend playtime. But I'm not one of them.