The Pink elephant

It's so difficult to explain to a toddler/preschooler because each explanation needs an additional explanation to explain the original explanation. Case and point. The following conversation:
Kiko: Mama, what does "strange" mean?
 Me: It means something looks weird, not normal.
 Kiko: What is weird?
 Me: Looks different, not what you're used to seeing.
 Kiko: and normal? What is normal?
 Me: (at this point a little out of words and frustrated) Normal is something you're used to seeing to doing. Not normal is something that you're NOT used to seeing or doing.
 Kiko: Like what?
 Me: umm,, well, a pink elephant. that's not normal because elephants are usually gray
 Kiko: So that makes the pink elephant strange then?
 Me: Yup.
 Kiko: But a pink elephant is a girl elephant and it's normal to see girls!
 Me: but not normal to see a pink elephant.
 Kiko:Awwww... Poor elephant.