For your sisters next birthday, make the theme unicorns. Then dig a hole in backyard and yank all decorations off the walls and shove them in the pit. Great now set it on fire and FORCE your sister to watch it.
My sister is unicorn nerd. I hate unicorns. She keep begging me to tame it in survival evolved. Once I tamed it my sister asked me to kill all my tames and only keep the unicorn. I was like “NO” especially for my high-leveled fully mutated dilophosaur (Dennis) and my Allosaurus army ✊. She took my phone and killed Dennis and harvested the meat and I can’t even take the imprint. I was so vivid that I killed the unicorn and I even LITERALLY blew up any unicorn I saw from then on. (RIP Dennis. You will be missed 😭)