As Serafina said its in the aspiration rewards, here's a little tip, only ever use it if your Sim is Gold or above and wear a thinking cap while preparing/serving it. this increases your anklebiters IQ; (faster skill learning) and sometimes it sticks throughout adulthood! Something that I love cos all my kids are Knowledge Sims until they go to Uni, (kids that want to learn!) then they go play...
EDIT- It can only be used for Toddlers.
*Teach the children to cook, really or its firetruck time when they are teens, there is a little toy oven that can help as well as the bookcase.
*Forget the nannies they are borked past repair, juggle the parents jobs so that they are home with the baby/toddler/child until they become teens. Sounds hard but the top jobs have better hours for babysitting.
*(IMHO) Knowledge Sims make the best parents, they want so much for their kids unlike the family Sims who just want to repopulate the NH.
Hope this helped and enjoy!