The Sims 3 Glitches

Cooking Skill Exploit
Okay first have one of your sims watch the cooking channel on the television get rid of everyone in the room except for the sim (So he can't socialize). When you see the test tube above his head, bring someone in to play video games. Notice that the tube is still there. He will continue to gain skill until you do another cooking activity it will disapear after that cooking activity. It will disapear when you do over skill boosting activitys also. The only skill that gives you cooking skill and itself is athletics. Such as tredmiles and jogging. after these activitys your tube will still be there.