I think my daughter is smart for doing this but I read online maybe not?

Karla • 26. Married. Momma to 2 baby girls ❤️
I know this isn't a post about relationship, period, or baby but I just need to hear some opinions and I didn't wanna post it on Facebook. 
My daughter loves to line up and organize things. Not just toys, absolutely anything and EVERYTHING she could get little hands on. I read it's normal but I also read it could be an early sign of autism... she's 19 M and she started lining things up at around 15 M. I think it's adorable!! I love finding random patterns around the house. But those kiddos, what have you moms experienced? Here are some pics 

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