Say: FOR-in [or FAR-in] BAH-dee
A foreign body is anything that gets into your body that doesn't belong there, like a splinter. Little kids often put things like pebbles, beads, food, eraser tips, or toy parts in their ears or noses. You probably don't do stuff like that anymore, but maybe an insect has flown into your eye or nose.
Often, our bodies can get a foreign body out on their own by blinking or sneezing. But when they can't, kids have to see a doctor for help.