I have to admit, this movie scared me so much as a child; I was young and sensitive so the movie's darker moments (especially a scene near the end) left a big impression on me. I would hide in my closet and cry when my mom tried to get me to watch it again. For this reason I cannot recommend it to very young viewers or very sensitive viewers; the imagery does stick with you.
However, I would encourage everyone else to watch it. This is one of those movies that gets better as you grow older. The main characters are likable and fun; they act like a family and stick together during tough times and even when they do not like each other.(Though they've been abandoned, they don't abandon each other.) The toaster even gets some character development during a certain scene and starts treating the blanket nicer. (The vacuum cleaner and the lamp also have their heroic scenes, as well as the toaster at the end; hence the title!)
Those same darker moments that used to scare me so much now get me to thinking about possible deeper meanings: for example the cars' stories, the A/C's fit, and the lonely flower. (IMDb has some great theories about these.) Of course, this movie also has some really light parts, the appliances clean the cottage to Tutti Frutti, they have some cute conversations, and nearly everything the radio says is hilarious especially if you get the references.
(Note that the radio does say d___ and h___ while quoting a line from Moby D--k in the waterfall scene if that is a concern for you.) (EDIT - Sorry for the obvious censoring; the site won't let me post the book's title!)
Overall, I give this movie a ten. It's a great heartwarming adventure story that's surprisingly dark for a children's film. If you want to show it too a kid, just make sure they are mature enough to handle it and you're all set!