Your child is old enough to sleep with a pillow, but the choices for toddlers are sparse, not to mention too fluffy (in my opinion), i.e. unsafe. This one is the perfect size/height and (bonus) has an organic cover.

Lifekind also makes the most comfortable (soft) organic bedding as well. So buy the twin sheet set to go with the toddler pillow while you’re at it, or maybe even linens for your King.  There are no cartoon characters on the sheets – may have to answer to your child on this point.  But, you will not regret these purchases.  In my home, a well rested child (not to mention parent) is priceless.