Make sure you don't mix up those T's with D's like in the words teetered and peter. The audience may not have the words before them so they rely on your voice to understand, so make sure to really articulate to avoid any confusion. The more you over articulate and practice your tongue twisters, the easier it'll get.

I love your voice for this and I feel it gives it that youthful, fun touch! I want you to find moments where you feel the emotions of Peter change and adjust your voice and emotions to those. When it proved to be terribly tough for Peter, make your tone fit that emotion or when peter loves doing what he does, show that in your voice! The audience will love and connect more to those emotional changes and be more invested into the story as we all have emotions and can relate to certain things.

When naming off the different animals and such, try to give them each a subtle change so its not static the whole time, since each animal and person is a different thing/person. Great work!