He dont like to be grounded!

My son really hated to be grounded. Well, if he is grounded he could not do anything for one whole day. No ipod games and computer games but he can watch his show. He really dont like it but still he keep on doing things that i dont want him to do like disobeying to what i told him to do. I dont like to punished him too but i need to for him to learn. I think it is working. at least he know that if he is a bad boy and wont obey mommy, he will surely get a punishment.