All Sims have the Grow Up Aspiration when they're young, and they all need the same thing: love, time and attention from their family. See to it the other Sims around them make the time to teach these young'uns what they need to learn, and you'll give them a great head start on life.
When a toddler's aspiration bar stays deep red for a long time, it will cry, whine, and throw a tantrum. A social worker may come and take them.
When a child's aspiration bar stays high red for a long time, it will smash flowerbeds, dollhouses and urns, kick tombstones and trashcans, and throw tantrums. Some may even start fights with a family member or a visiting Sim.
When you let your child grow up into a teen and quickly let your Sim age up into an adult (Because the bar stays full for a second), your Sim will keep the Grow Up aspiration. The bar names are the same as the one from the romance aspiration.
↑This is defined as growing up with the aspiration bar in gold or platinum. For toddlers, this is a 1000 point want. For children, it is a 2500 point want. The points are awarded after the Sim has grown up and the aspiration bar has expanded.
↑While children can be read to, the want to be read to is apparently specific to toddlers.
↑This is effectively a want to learn to study, as that is when the want is fulfilled. However, it is labeled as a want to ask for help with homework.
↑This is defined as growing up with the aspiration bar in red.