why do you keep those toys?!

I DO NOT LIKE TO THROW THINGS. Especially from my childhood. Everybody asks me me why I keep my old toys in my family basement or even in my 'grown-up' room. Now I can show them why ;)
I won't show how to build this because I think all of us know HOW TO use legos yea? I wish I could have them more I could build something bigger, maybe a table?