I was trying to help Gavin put his boots on (as per his request) but was having trouble getting his foot all the way to the bottom. I couldn't figure out why it wouldn't fit (was he scrunching his toes up?) and I also didn't know why he kept saying, "Apple! Oh, no. Apple," and I kept saying, "No, this is a BOOT! B-O-O-T-S, Boots!"
It was because the apple that he had been eating earlier was stuck in the toe of the boot.
He must think I am so stupid.