The competition center is a good way to earn extra LP or simoleons, if you haven’t built it yet you can find out where it is in simtown from the town map 
The higher level you are in a career or hobby the more chance you have of winning first prize at the competition center.
When you click on the competition center (as shown in the picture below) it will appear with a competition (I had the archery hobby) it tells you how much you will get for each placing (which is always the same, regardless of the competition you get):
- 1st place- 3LP
- 2nd place- 1LP
- 3rd place- S1000 and 1000XPs
- 4th place- S500 and 500XPs
Then you can select a sim- always go for the sim with the highest level in that hobby/career (it will tell you what level your sims are at)
For example: Zack is level 6 in archery so I would definitely use him over Hayley who has never done archery before (level 0/6)
NOTE: your sim must not be busy for them to partake in a competition, they will appear greyed out if they are busy.
Once you have selected your sim they will be busy competing for 24 hours, once the time is up you will need to go back to the competition center to see where they were placed.
If your sim is level 6 then they should come first but they don’t always!
At 9am everyday a new competition becomes available if your sim isn’t partaking in one already so keep checking back until you find one that you want to do!
NOTE: If you changed a sims career or hobby, for example if they did cooking and then you changed them to fishing their skill level for cooking will now be 0 so entering a cooking competition will earn them fourth place.
Is it worth it? I rarely use the competition center if I am being completely honest, it is a good way to make a few extra LP but it does mean your sim cannot do anything else for a whole day.
Which careers appear at the competition center?
- Art (Artist Career)
- Acting (Filmmaker Career)
- Athletics (Athlete Career)
- Firefighting (Firefighter Career)
- High School Student (teen required)
- Music (Musician Career)
- Politics (Politician Career)
- Real Estate (Real Estate Agent Career)
- Science (Scientist Career)
- Student (preteen required)
- Teaching (Teacher Career)
Which hobbies appear at the competition center?
- Aerobics
- Arcade Gamer
- Archery
- Ballet
- Bird Feeding
- Bowling
- Breakdancing Battle (Breakdancing Hobby)
- Broomstick Flying
- Catwalk Modelling (Catwalk Model Hobby)
- Chocolatier
- Class Clown
- Cooking
- Diving
- Fashion (Fashion Designer Hobby)
- Fashion Hunter
- Figure Skating
- Finger Painting
- Fishing
- Ghost Hunting
- Juggling
- Karate
- Musical Expression
- Pinballer (Pinball Enthusiast Hobby)
- Potion Brewing
- Quilting
- Salsa Dancing
- Sculpture
- Sim Nation Teen Idol (Teen Idol Hobby)
- Skill Tester
- Spell Casting
- Storytelling (Storyteller Hobby)
- Survivalist
- Toddler Playhouse
- Woodworking
These are all the ones I have seen so far but I am still updating this post, if you have seen others please comment and I will add them to this post
NOTE: you may get competitions for hobbies and careers you have not yet unlocked
