My kids haven't swallowed anything but my dd, now 13, did put an M&M up her nose when she was about 2 or 3. It was ALL the way up there.
My dh took a flashlight and a tweezer and got it out
Yes, I know it was dangerous. I was at work and THANK goodness I wasn't home to know that it had happened until it was taken out with my eyebrow tweezer