Froot Loops

Z.: I want to go with you to the store so you don't forget to buy Froot Loops.
Me: Why do you want Froot Loops?
Z.: Because they're very expectful to eat.
Me: What's "expectful"?
Z.: "Expectful" means, um, "really reliable."
Me: What does "really reliable" mean?
Z.: (after a pause) Poop.

Not sure where he ate Froot Loops, but I don't intend to buy any, just for the record.