Sims will age up in The Sims 3. If you are currently playing as the sim to see when they are going to age up go to the plumbob next to inventories then hover you cursor over the green bar. To make your sim age up either buy a birthday cake from the grocery store or from buy mode, categories, entertainment, parties, cake or you can go to the 3 dots above your sims head, click on options, go to the plumbob shape and adjust the age your sim has to be to age up. You can also use a cheat, press down control shift c. Type in testingcheatsenabled true then press enter. Hold down shift and click on the sim you want to age up. Click on trigger age transaction.
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You have to install it from a sim pack file, then you'll find it in the body shop, or pre-made sims in CAS under the right age and gender.
There is no cheat in Sims 3 to get your teen pregnant but if you enter the cheat in testingcheatsenabled true you can right click on your sim and then you click trigger age transition and then get your sims pregnant once your sim has delivered the baby right click on your sim again and click edit my sim and then you can make it a teenager again and your sim will still have the baby and that is how you can have a baby when you are a teenager
Hit control shift c and open up the cheat window. Then type in testingcheatsenabled true and press enter. Shift click your Sim and there should be an option to 'Trigger Age Transition'. If you press that, you can age your Sim as much as you please.
Yes, there is a cheat for it:Make two adult Sims and move them into a house.Click Ctrl, shift and C at the same time.Type in: Boolprop testingcheatsenabled trueShift click on your Sim and click "Sim Modder" - a baby should appear.Click on the Sims modder (baby) and click "Set age..." and then click "Child".Your Sim will now be a child.Click Ctrl, shift and C at the same time again.Type in: Moveobjects onGo into buy mode and delete your child Sim.Shift click on the bin outsde the house with your other Sim which is still and adult and click "Reset age duration" your teenage Sim will come back and now be able to do anything an adult Sim can do.Repeat all the steps with the other Sim.Now you have two children Sims who can kiss, make-out, woo-hoo ect...THIS CHEAT ACTUALLY WORKS I'VE DONE IT MYSELF!!!
Yes, you age. Adults usually live around 30 sim days until they become elders.