I would imagine that this cheat will work with all expansion packs, I have all of them and just figured it out. But lets begin,
1. Create your family, but give them no attributes.
2. Next, buy the potion maker, and make potions until you get yellow, which will reverse all your attributes, so your attributes will be maxed. (note-this could take a while.)
3. Now, enter the move objects code by pressing Ctrl+Shift+C then typing move_objects on
4. Now when you receive a skill, such as 1 logic skill from making potions, save the game and go to buy mode. Delete your character and go back to play mode. Click on your characters icon and he will be back with all of his previous skills due to the save and your characters will also be happy do to deleting him/her and bring them back.
I hope that this works for you, and have fun, if you have any questions please email me or I'm me my email is email@example.com and my aim is liknprkundgrnd