What do you think about me taking a child's toy just to watch him cry?
Do you think that's a little mean to take their toy?
But it's a rare item and I can sell it on Ebay for a high price! I'm just joking around.
Taking something from a child to make them cry is not something to joke about. As an adult, you should try to make children happy instead of doing things to make them upset.
I'm a bit uncomfortable with how you worded your response.
Why? Is it because you're thinking now about how wrong you may be? While you find this funny, the child would be traumatized by losing his toy.