Books, Notebooks and Money (not lying).
Those books are still there in the cupboards of the top floor of my place (those which i did not donate to anyone); Notebooks-I don’t know what happened to them,may be they have been sold to a ragman (My hard-work put in homework during school times went in vain 😢); Money-It’s in bank, every penny I got in childhood n college I never used. I love those notes. 😂
Actually, I could not remember what exactly i was attached to in my childhood (something deeply), so I wrote this answer. I may update it later on if i ever remember what it could be. In reality, I was a highly detached child as detached as I did not even feel the need to get any clicks of my schools or colleges, thus, being attached to things was really not my thing. Even about any kind of gifts, I used to tell any elder to keep them in safe custody.