As i recall, You just walk up to it/run over it and the bear falls to the chair. This also makes a book fall over next to it. When you are in the room as a big sora, you can read the book to get a mythril shard or something like that. If you move the bear to the other chair, the book will become flat so you can't pick it up, and the flat clock in the wall will pop-out. You can then move the clock asside to reveal another hole in the wall. I think this hole leads to the tea-party garden, on the balcany above the table. From here you can open a chest containing Aerora-g.