The Sims 2: FreeTime/Hobbies

There are several hobby objects in The Sims 2: FreeTime and it seems right that most can be found in the hobbies category.

The BOB 3942 by SoundEscapes
The synthesiser is a unique instrument that lets you create your own music rather than listen to prerecored tunes. There are several interactions for this object.
 * Price: $1,500
 * Initial Depreciation: $225
 * Daily Depreciation: $150
 * Depreciation Limit: $600
 * Need Effects: Fun 10, Environment 1
 * Skills: Creativity, Mechanical
 * Hobbies: Music & Dance, Tinkering
 * Community Sort: Miscellaneous
 * Practice: Always available. Builds creativity and Music & Dance. Quality of music is dependent on creativity.
 * Compose: Unlocked at creativity 4. This is the interaction to create custom music. There are several elements to composing a tune and some can confuse you. The sub-interactions are.
 * Audition: Choose from melody, bass or rthym and select one of their five tracks. You can also remove a track from your composition.
 * Change Style: Changes the style of the music when you audition. The choices depend on creativity and they are Electronica (always available), New Age (Creativity 6), Pop (Creativity 8), Sci-Fi (Creativity 9) and Classical (Creativity 10).
 * Save. Saves your custom track. Must be named first. Custom tracks are actually saved on the sim and not on the object itself.
 * Perform. Perform a custom compostition or a random track. Sims can only perform tunes that they have created. While performing, other sims may do these interactions.
 * Watch: Sim cheers or boos based on skill, relationship and personality. Available while practising as well.
 * Dance: Choose a dance and boogie just like any stereo. Functions as normal dancing.
 * Tinker: Tinker with the synthesiser. Carries chance of electrocution.
 * Repair: If synthesiser breaks down, this interaction repairs it. Carries chance of electrocution for low mechanical sims.

Simavarious VII Concert Violin
The violin functions almost the same as any musical instrument. It has these interactions.
 * Price: $2,200
 * Initial Depreciation: $330
 * Daily Depreciation: $220
 * Depreciation Limit: $880
 * Need Effects: Fun 10, Environment 2
 * Skill: Creativity
 * Hobby: Music & Dance
 * Rooms: Study, Living
 * Community Sort: Miscellaneous
 * Play: Sim plays violin. Skill at playing depends on creativity. Note that there is no practice interaction and unlike the piano and other instruments. It doesn't let you select the genre with which to play. If Music & Dance level 10 is achieved, several things will happen. First, your sim will dress into their formalwear before playing. Second your sim will also hear the noise of an audience as they play.
 * Play for Tips: Just like Play except your sim gets out a tip jar. Functions the same as other instruments. As your sim plays, other sims will tip him or her based on creativity skill. Obviously, if no-one is on the lot, your sim will not be tipped. When sim stops playing, they check the tip jar and react to how much they've earnt.
 * Watch: Sim watches other sim play and reacts based on the skill of the violinist.

The Formidable Formicarium
Once placed, the ant farm gets to work. Every three hours, tunnels will show to reflect the work being performed by the ants inside. After six hours, the ant farm is complete. To reset the ant farm use the Shake interaction on the ant farm.
 * Price: $185
 * Initial Depreciation: $27
 * Daily Depreciation: $18
 * Depreciation Limit: $74
 * Need Effects: Environment 2
 * Hobby: Science
 * Rooms: Study, Living
 * Community Sort: Miscellaneous

Interactions:
 * Observe Ants: Child or older can observe the ants for fun and science enthusiasm.
 * Shake: Sim shakes ant farm, reseting the interior to its original state. As well, there's a chance the ants will fall on your sim, causing the same effects as poison ivy i.e. drops is fun and comfort and stopping every-so-often to scratch.

One Man's Junk Car from Mechanically Minded
The restorable car must go through several stages before it can be used. There are two sections that must be worked on before you can paint the car; the engine and the body. When working on the engine, watch out for explosions as they cause the sim to stop working. When working on the body, you don't have to watch out for explosions but take care as this project really drains their needs. Once both parts are finished, choose a colour to paint the car. After that, it becomes a fully functional car that acts like the cars from The Sims 2: Nightlife.
 * Price: $800
 * Initial Depreciation: $120
 * Daily Depreciation: $80
 * Depreciation Limit: $320
 * Need Effects: Comfort 6, Energy 2, Fun 5
 * Skill: Mechanical
 * Hobby: Tinkering
 * Rooms: Outside

Interactions
 * Work on...:Choose between the body and the engine. The engine has three stages of completion but little explosions can knock your sim out of working on the car. If this happens, reperorm the interaction. The body has four stages of completion but your sim will work non-stop if their needs stay high enough.
 * Rev Engine: Sim gets in the car and tests the engine out. The effects correspond to the three stages of completion. Smoke means the engine is still in its first stage and no smoke indicates the second stage. The third stage is indicated by the completion of the engine.
 * Paint...:Select a colour to complete the car. If you don't like the colour you can actually re-decorate the car anytime you wish. After the car is painted, it spawns all the interactions as the cars introduced in The Sims 2: Nightlife. You can also sell the car, if you own Open for Business, on a business lot.