I drew a bridle with orange crayon on my Merriweather.
I decided that it was unfair that some of the G3 ponies had glittery symbols, and some didn't, so I put glitter glue on some of the non-glittery ponies, but it got gross and gray very quickly.
I had a fakie that I put stickers on, and I tried to take them off later, so there was gross residue left behind.
I chewed on my Brights Brightly's horn, and when I took her to my friend's house, I lied to my friends and said that my sister did it so that they wouldn't find it weird that I was chewing on my ponies. (I was like 7 then.)
And not a real pony, but too funny not to mention. I had the Cherry Blossom version of these bubble baths, and you can remove the pony on the lid to use as a bath toy, and there's a hole on the bottom to attach it to the lid. I remember I used to like filling this hole up with bathwater and drinking it, and pretending that it was special "magical pony coffee".
https://www.amazon.in/My-Little-Pony-G3-including/dp/B01E7OUXGU