My younger DD swallowed a WING NUT!! Right in front of me! I said "spit it out" so she (at about 30 months) swallowed it. We went for x-rays, and it was sitting in her stomach, clear as anything - a half inch across. The Dr said seeing as it had already cleared one sphincter, it should be fine moving from stomach to bowel, but I should watch her nappies in the meanwhile. Moving on three days, back for an x-ray, stomach and whole bowel clear. She was using the toilet as well by then. I didnt hear a clunk, but lots of whole wheat bread did the job!