What are some unique disciplines for a 4 (almost 5) year old?

His behavior is typical for his age. He's probably just going through a stage where he's trying to test authoritative limits. Does he like karate? Maybe threaten to stop taking him if he isn't going to to pay attention and try. Sit him down and talk to him about his behavior. Let him know that the behavior he is exhibiting is unacceptable and explain to him what you expect from him.

Unfortunately, in my experience, this stage isn't a very short one. He's going to keep trying to see what he can get away with. It's kind of his own way of exploring the world and learning how things work and maybe deciding if the punishment is worth the crime, so to speak.

The next time he has a good day at karate or gets a good report from daycare, reward him. Take him out for ice cream and some one-on-one time. If he sees that good behavior is rewarded maybe he will be more likely to want to be good. Rewards can be limited or lessened over time so that he doesn't expect to be rewarded every time he is good. This gives him a chance to see the natural benefits of good behavior.

Just try to make him feel easy and try to make him happy by giving choclates and tell him what to do and what not to do...