Bulletproofs are used to prove that the coins are within a range. IPA is a building block. They are a fundamental for building blinded amount ecash. And with blinded amount ecash, you can have ANY amount ecash, which makes ultrasmall wallets possible.

Oh boy... please imagine talking to a 2 year old child when attempting to explain this concept... we're literally on that level. Would be really helpful to have a rough but understandable concept to wrap our (very interested, but limited) minds around