How to Bathe Toddlers in Sims 3by Seth Amery ; Updated September 22, 2017
Thanks to the Needs bar, babies in "The Sims 3" are no mystery to keep happy; the only thing that might confuse new parents is bathing. There is no tub your Sims can purchase to bathe children, and the normal one is too deep to use safely.
Improving a Toddler's Hygiene
Unlike in "The Sims 2," parents in this game don't have the option of bathing their toddlers in the sink. Like babies, the only way to improve a toddler's hygiene is to change its diaper. Even if your Sim has already gone through the ordeal of potty-training the little one, you'll have to change the toddler's diaper, but the hygiene bar won't degrade as quickly. When your toddler's hygiene bar is nearly empty, interact with the toddler to change its diaper the same way as when it was a baby. When the animation completes, the hygiene bar completely fills back up with green.