I think one of my children flushed something down the toilet. The only things I think it can be is either a bar of soap or a wash cloth. Now you have to plunge it every time you flush. Any suggestions on what I could do myself before I call a plumber?

Hi Danni,  Go down to the hardware and purchase a closet auger. There will be instructions on its use.  It it's a wash cloth that's down there then auger will bring it back and if it's soap push and pull the snake back and forth and try to break it up.  Try to keep the blockage in the bowl.  Don't try to flush as you might send it on down where you can't reach it with the auger.  More questions?  I'm as close as a click.    Tom