Thank you for the replay. I tried with Hint but it's a very generic one.. don't wanna spoiler the game, at the moment I have pool cue, silver key, set of tools, ceramic vase, candy cane, tin of chocolates and toy train, and don't know how to use any of these.
There are four possible things Santa asks you to find (it's random each game). You have three of them, so I'm guessing you're looking for the fourth. Try looking around in the abandoned play area again and talking to Deirdre.