15mo taking off her diaper

Nadine

baby girl is 15 Months & a few weeks , she started doing it at about 13 months a few times then stopped figured it was just a phase lol , then yesterday she took off her diaper while walking and got her wipes opened it and wiped herself lol 😂 it was so funny and cute , then later on took it off twice and started running around. I'm thinking she's too young to be potty trained but not sure... any advice? does you 15 month do this too?😶