Firstly I live in Victoria, Australia. It was about 2 years ago on Christmas Eve and I was asleep in bed when I was woken up by someone slapping me softly and giggling. When I woke and opened my eyes I saw a little boy with blonde curly hair. He would have been about 5. But as soon as I opened my eyes he walked around my bed and into the closet.
When I saw him he wasn't transparent or anything that I've heard ghosts look like. He was solid just like a human. So when I saw him I thought it was a human in my room so I got out of bed immediately and ran to my closet to see who it was. When I opened the closet door there was no one there so I closed the door and got back into bed. I was quite scared at this time.
My bedroom door has a lock on it (living with untrustworthy housemates) which was locked at the time. As I was lying in bed I saw the lock open, even the little knob thing turned which would not happen if it was opened with a key. The door then opened and I heard a giggle and the door closed again.
I have not had any experiences with anything supernatural before or after that. I would also like to add that the house I live in is quite new and I am the first person to live in it. It has always been an empty block of land. Any help as to what this was or why it did what it did would be greatly appreciated.