ま

Imagine that this character is a telephone pole, which is needed so you can call your ma. It’s pronounced “ma”.

み

This character looks like the number 21. Imagine you’re 21 years old and someone asks how old you are. You say “Me? I’m 21”. It’s spelled “mi” and sounds like “me”.

む

Imagine that this character is the side view of a cow saying “moo”. It’s spelled “mu” and sounds like “moo”.

め

Imagine that this is a gold medal hanging around someone’s neck. It’s spelled “me” like the beginning of “medal”.

も

This looks like a fishing hook with no bait on it, so it needs more bait. It sounds like the “mo” in “more”.