The Rugrats Movie
I tried to make my son watch this movie while I was on maternity leave. It's about accepting a new sibling, so I thought it might help him deal with having a new baby sister. It sucked, so he wandered away after 10 minutes, while I was stuck on the couch breastfeeding. I ended up watching the whole thing, all the while hoping I would doze off, but I never did.
I find it hard to believe that little kids would like something like this, but I guess they do. At least Rugrats suck less than Caillou.