Seasoning Chili for Young Children
You have four immediate options as I see it:


Lightly season the chili, remove a portion for your child, then season the rest to your liking
Lightly season the chili, then serve it with additional accompaniments to adjust it to your liking (eg, hot sauces)
Season the chili to your liking, but serve it with something to help cut the flavor for the child (cheese, sour cream, mix in crumbled cornbread, rice, extra beans, honey or sugar)
A blend of 2 &amp; 3.


I generally go with either #2 or #4 if I'm cooking for a large crowd.

... the long term solution is to try to slowly adjust the flavoring of the chili until the child's more accepting of the flavor.  But remember, everyone has different tastes, and our taste buds change over time ... the child might be more sensitive to bitter or spicy foods right now, but could learn to enjoy them in the future.  (I personally now love spicy foods, when I didn't as a kid ... but I still hate bitter)

You might try making a few varients, and see if there might be a specific taste that your child objects to, so that you can adjust.  I assume you have the 'you must try at least one bite' rule, and don't accept the 'I don't like (whatever)' temper-trantrums.