I used to think the band "Alice in Chains" was "Alison Chains."
When I was playing Final Fantasy VII as a kid, I thought Sephiroth was "Spider-Hoth", and I thought cheese steak hoagies were called "Bako Sandwiches".
My folks found what I'd say wrong amusing and didn't always correct me until it was already too late... They gave me early access to learning words and letters and math before going to school (as well as a computer and some sound effects books), but sometimes they liked to fuck with the learning aids.
That whole "The cow goes 'Moooo'" "The cat says 'Meow'" toy?
My father figured out how to turn the knob at the right time so that it'd give me the wrong animal sounds. This was just sooooo funny to him. That and not correcting me saying things wrong unless the word itself was phonetically inaccurate led to some odd conversational trip ups with friends of mine... some persisting into my teen years.
Karma reared it's head though when I got these little laser gun toys though: