DD recently asked me if I believed in the easter bunny and santa. I asked her why? then asked her if she believed in them, and why was she asking me that?
Turns out a friend at school told her mum that she didn't believe in the easter bunny, and she got no easter eggs, so if you don't believe you don't get presents!
I think she may be working it out, or have worked it out, but clever girl wouldn't say anything if she did LOL! She'd be working it for all the extra presents she could get. (My little budding entrepreneur, recently made biscuits with her grandma THEN sold them back to grandma!)

We leave milk out for santa and some biscuits or something else, last year it was fruit mince pies. We also leave some water for the reindeers and a carrot.
She also writes a letter to santa.
When she wakes the next morning, santa's food is usually gone, the reindeer have usually drunk all the water, but not all of the carrot/s, BUT you can see their teeth marks on the end of the carrot though! She absolutely loves that. Her letter is gone, and santa leaves one for her too. Last year he told DD that he had dropped by our house, and found that we weren't there, so he worked out we were at nanny's. Our dog barked at the reindeer, so he threw the ball for her a few times and gave her a bone.

Nic