I used to think the saying "take something for granted" was "take something for granite" and figured it was because granite isn't very valuable so if you take something for granite you don't think its very valuable
A childhood belief about speaking

others believed things like this
- When I was little,I used to think the TV stopped when I went to bed. I figured it all faded to white.— Sharon
- I used to think I smelled wrong, but I figured out it was because we never used dryer sheets. — blnkfrnk
- I was sure I had it figured out: exploding turds caused farts.— al
- i thought the name Anon, was really a name...pronounced A-Non...haha i figured it out— Norman einstien
- I used to wonder what kind of insect "uncles" were named after.
I had "Ants" figured out.— Kimberly in AZ - I knew that dairy farms have silos so I figured that they're where the milk is stored.
— marianne