Magic Forums

It started last summer, every week during 2am-3am I would wake up and hear someone playing our piano, not playing but pressing one piano key, pressing it once or twice.. then silence. The first time it happened I thought it was my father, I ran upstairs to tell him to stop cos I was trying to sleep. No one was there. Since then nothing had happened until again this summer.
My sister is often downstairs in the garage playing on the computer, she often feels like there is someone there and has often seen something in her peripheral vision. The same thing happened to me when I was playing on her computer, I saw a white figure in my peripheral vision, I looked to the side straight away.. nothing there.

A couple of days later me and my sister were in the same room talking when suddenly the lamp (it was in the middle of the table not on the edge) fell down like somebody had pushed it or stood on its wire. No one was there but us, our cat might have done it but we didn't see her run away or hear her bell.
Then today. Our mother was baking and watching TV at the same time. She looked up at the TV and saw that someone was scrolling through the channels and changed the channel (we have Sky; British cable thing) She ran into the TV room, no one was there and the remote was on the sofa, upside down.

Now there could be logical explanations for everything, but say we are dealing with a possible ghost, would you advise against using a Ouija board? If so, what should we do? Just leave him alone?