I have done some weird things as a kid. Some of them were:

-Eating soap (Don't make a Melanie Martinez reference in the comments)

     I would literally get the hand soap in our bathroom and just pump it into my mouth. I have no idea why, but I loved the taste

-Cutting my own hair

     By far the dumbest thing I've done. And I never learned my lesson. The first time, when I was about 5, me and my friend were in Pre-K. We thought it'd be a great idea to hide under the arts & crafts table chopping off each other's hair. The second time, I cut off my baby hairs, and they're STILL growing back out.

-My Geography Skills

     Before I start, Leanne, Willow, Clove, Raven, and any other British people reading, kindly look away before you begin cringing. I used to think that London was a continent that had England inside of it. Basically I thought Europe was London and most of Europe was England.

-Greek Phase

     The only time I voluntarily learned was 3rd grade. I went through a "Greek Mythology Phase" after reading PJO. I went to libraries and just researched about EVERYTHING. I still remember most of what I learned from then. The weird part about this phase though, I was convinced that I was Persephone. I would try talking to squirrels and making flowers grow at my feet. 

~Lina