Keys: the gold one is under the pillow in the bed and the silver one is in the window.
Rings: one is in the bowl and another one will drop out only if you draw the curtain for a few more times.
Power supply: it's in the drawer which you can open with the keys.
Scrip: it's in the unlocked drawer.
Battery: it's hidden in the gap at the corner of the bed.
Tole: it's beside the bed and you can find it only if you click for a few times
Tape: it's under the table
Stick: it's in the gap between the bedhead and the mattress
Can ring-pull: it's beside the speaker
Safe code: scrape the scrip with the ring-pull, then you'll see it
CD box: it's in an unlocked drawer
Safe key: turn on the CD player and open the CD room, then you can get it
screwdriver: it's in the safe, grap the handle or you'll lose it
OK, then put the battery, the ring, the tole, the stick and the tape into the strange box, open the box and play the flash, you'll see '+' when it's almost over, as soon as the flash ends, click '+' 3 times continously, then you'll see the safe. After you take all of the items, put them into the music box, and the little man starts dancing. Don't hurry, move you mouse to the place which the little man points at when it finishes dancing, do remember not to click it until he leaves and hold your mouse there. When you're back to the room, click it. If nothing changes, click again!
这是答案!