Next, instead of handing your rat the treat, hold it a few inches away so he has to come get it. Gradually make him come farther to get the treat until he will run across the floor, couch, table, or bed to get his treat. Before your rat will play with you, you have to gain his trust. At first, when you take him out of his cage, he'll feel insecure and not much like playing. So, start by playing with your rat inside his cage where he feels secure.
Rats play together by wrestling and chewing on each other just like puppies.
If you pretend your hand is another rat, your rat can wrestle with you too. Put your hand in the cage and let your rat sniff and nibble on your fingers. When he seems unafraid, you can wiggle your fingers and stroke him. If that doesn't scare him, you can gently poke and pinch him to encourage him to get feisty. Rarely, a rat will get too excited and bite a little too hard.