adds "set age" to the interaction menu. Any sim you click on can be set to any age group you desire. agesimscheat off turns it off. I use this to grow up some annoying Townie kids.
boolprop testingcheatsenabled true
Shift click on the Sim
Choose Set Age Young Adult from the menu
You can do this before or after moving them to college.
The Sim will retain all his family relationships and behave normally. He will
now be able to go to college.
In the Neighbourhood, agesimcheat on and set the Sim to teen, have her phone the University for a place. Again all relationships are retained. Can appear a little odd if he is married but once graduated he will still be married, to the same Sim.
1 There seems to be an issue with the aging -off cheat, where if you choose the grow up option while using the anti-aging cheat, it can makes the Sim six days younger instead of aging them.
This can actually be used to advantage: if you want to alter the relative
ages of the Sims in the family by a few days, wait till you get the message that
says the Sim in question, say it's Frank, has 1 day till they grow up. At that
point use aging off. Now click on Frank and choose the Grow
Up option. Because aging -off is in place the Sim will grow YOUNGER by
a few days. Now turn aging on. I am told this method works on
all transitional stages but I have not tested it on all yet.