I remember installing XFCE on an old Pentium 3 tower some office had stored under the stairs. It was like magic - the system just... worked again?! It was the first time I successfully installed Linux and it felt so fast. With Windows the thing barely worked.
That became my younger sister's first computer. The tower and monitor etc. all just stayed on the ground and we played games on it together. Eventually I found an ethernet card and learned how to plug it in. I ran an ethernet cable from our modem through the house along the floor. Then we could go on Myspace and send email to each other.
Can't believe my parents were ok with tripping over all that stuff, ha!