Ah, I don't really know to be honest! I think... On a sentimental value, it would have to be a toy bunny my nanny bought me ages ago. I named it after one of my pet rabbits. It's of value to me because... Well, my nanny isn't alive anymore, and neither are my rabbits, so it's precious to me because it just reminds me of them both, and all the special memories I shared with them.
But on a more materialistic note... Ugh, I dunno. It's bad. I have lots of cool stuff, but I genuinely can't think of the one thing I treasure above all else. Maybe my WiiU? My figures? My Amiibos? My camera? My laptop? My videogames? Honestly, I can't decide. I think I will just have to say they are all of equal value to me. I'm very very lucky to have such lovely possessions, and I am truly grateful for the things I have.
Maybe actually it would be my ballet pointe shoes. I'm still sort of getting used to wearing them, but they cost so much money, and it makes me feel like wow, I've made so much progress that I'm finally going to be able to wear them and dance in them! Hopefully... If my legs don't snap off because they make my feet/ankles ache sooo much. :')