Mine decided not to eat but to open up his own savings and loan. He shoved a penny up his nose. The doctor didn't believe me initially but when she turned the bright light on and shined it in his nose, she saw a new lincoln penny just waiting to be withdrawn. We all laughed about it afterwards, no one could believe the penny went all the way up his nose.
Wow, lol, I don't think my son has ate any change yet. He has eaten other foreign objects though. I can remember my MIL was watching him one day and I came over and thought he had chocolate chip cookie on his face...no, turns out it was mulch, lovely, lol!