I think toddlers and school-age Sims should be given more details and gameplay opportunities that would make them different from regular Sims. Why not have toddlers manifest their magical abilities the same way as in The Sims 3: toys disappearing, glowing, etc.? Toddler and infant werewolves can howl, aliens have a unique appearance, while the other occults are left out. Let mermaid children love swimming, vampires won't like school (because you have to get up in the morning and go study when vampires usually sleep). Why not have children learn from adults and dream about their occult abilities manifesting soon? I don't think the gameplay and workings of occults need to be completely reworked, but adding a couple of moodlets and new pie menu interactions would be cool, I think, and would make playing occults more interesting.