My nephew was watching cartoons and when my sister walked in he asked, "What does an eardrum look like?" She asked why he wanted to know and he said, "Well, something fell out of my ear and it looked like an eardrum to me so I put it back in." She flushed out his ear and found......a chunk of earwax.
He's the same on who, when we were driving on a bridge over the Mississippi river asked what the water was. I told him it was the Mississippi river and asked him to say 'Mississippi'. He said, "My can't say it." I asked him to try and pronounced it Miss-iss-ippe. He said, "My can't say Missihhippi, but my Mom can."