(Exodus 13:3) "and chametz shall not be eaten": (The intent of the verse is) to equate the feeder (of chametz to minors) with the eater. But perhaps (the intent is) to forbid derivation of benefit from it? From (Devarim 16:3) "You shall not eat chametz upon it" we learn that benefit may be derived from it. How, then, am I to understand "chametz shall not be eaten"? To equate the feeder with the eater. These are the words of R. Yoshiyah.
The Chametz Ban Applies to Feeding Others Not Just Eating
Mekhilta Tractate Pischa 16:29