Hi doc, good eve! I have 1 1/2 yr old son. I saw him playing a coin but before I get the coin from him , it was gone ,Im not really sure if he choke it, i just wondering if he swallowed and accidentally choke it.. I want to know the symtoms and the effect of choke coin. How long does it takes the effect to the child? though, Im still observing my son ,7 hrs ago it was happened. Thank you for your help..