わ

Imagine that the vertical line in this character is a magic wand that’s being waved around. The character is spelled “wa” and sounds like the “wa” in “wand”.

を

This character looks like someone falling off of a ledge and yelling “whoa”. It’s spelled “wo” and sounds like “whoa”.

ん

This character looks like a lowercase letter n. It’s spelled and sounds like “n”.