Here's a parenting tip for you.
Tell your children they are never to flush ANYTHING (other than the obvious and a small amount of toilet paper) down the toilet.
Last night Chavi decided to see what would happen if she sent a paper cup swirling down the drain. Even after snaking the toilet and cleaning the whole bathroom it seems the problem is still not quite resolved (or dissolved as the case may be.) So I was up at 5AM to give it a second try and now it looks like I'll need to call a plumber - I have a bunch of jobs for a plumber though so it will be a worthwhile call.
In her defense Chavi said "But you never told me not to flush paper cups down the toilet!"
Which is sad but true.
Parents, don't let this happen to you!
PS Elie, do you have the number for a decent plumber?