I'm planning to take away the fun toy from my sobbing little sister.
Why do you want to take your sobbing little sister's toy away?
I'm going to play with it and steal it.
It is wrong to steal your little sister's toy, especially when she is already sobbing. You are expected to care for your siblings.
I love seeing kids cry though.
That's awful, you should let your little sister keep the toy. It might make her feel better.