Legal advice. Please help...?

Hi i need help. My son (15 months) got a present from his grandpa for his birthday which was a cardboard box (hard) with little books inside. (disney winnie the pooh book block) Monday i was washing dishes and my husband was with my son about to get him juice from the fridge when he sow my son stick this medal piece down his throat. My husband was in frantic and took it out. Come to find out it came from the book block, at which my son bite a little hole it the corner and got this magnet out.(its there to make the book close) but it was not glued or nothing. About two hours after my son would not drink nor eat you could tell he was in pain. But i didn't think n e thing of it due to the fact three days earier he had a stomach virus and had problems eating. So when he went to sleep my husband and i use a tongue compresser to see down his throat cause at this time i was afraid it wasn't the virus and maybe it was the metal he stuck down. Well we looked and his throat was red and inflamed. I waited 1 day to see if it would go down, the following day i brought him to the doctor's and told them what happen. They looked down his throat, well tried to but no success, they sent me home telling me to watch it. Now im all messed up cause im looking at the book block and it says "Safety Tested On Children 10 months and up" and it doesn't say n e thing about small parts or metal on the box. I was wondering what should i do, my husbands says its called pain and distress, i am wondering what i should do????