Yeah, but then you said that you "messed with their heads" by making reindeer noises on the roof with a rake. That didn't make it sound like your kids were in on the joke.
It's not a joke if everyone's in on it.
I come from a long, proud line of practical jokers, and we teach this fine art to our kids early.
For instance, a couple of years ago, my oldest daughter was on her way with her kids to see us, and she came up with this fantastic story just out of thin air - she told her kids (ages 3,5, and 7 at the time) that I wasn't really a person - that I was a monkey who went home with my parents one day when they were newlyweds and visiting the New Orleans zoo. It was a big family secret - in fact, hardly anyone knew I was a monkey - not even my HUSBAND. She told them that I only take my MiMi suit off in the bathtub.
Then she called me and said, "You've got to run out and buy a gorilla suit and here's why!" So I did, of course. Every household needs a gorilla suit anyway, I figured.
Well, for two days we dropped monkey hints - saying things like, "Oh wow, that was so funny - it was as funny as a barrel of monkeys!" Or I'd tell the kids, "Stop all that monkeying around!" Or I'd say to my daughter, "Are you raising a family of monkeys or WHAT?"
The the coup de grace - that evening I went into the bathroom, and slipped into the gorilla suit, ran bathwater and then called out, "Hey, I forgot my shampoo!" Natalie told the five year old, "Here, take this to MiMi." Of course all their eyes got big as saucers. "Go on, take it to her," my daughter prodded. In she came, with her sisters (and dad with a video camera) right behind her. I had the shower curtain drawn. When she said, "MiMi, here's your shampoo," I stuck that GORILLA HAND out to get it.
IT WAS FREAKING HILARIOUS! All of them screamed and ran down the hall, as I followed in my gorilla suit. Pandemonium!!!
Then I took the gorilla head off (I could barely do it, I was laughing so hard!) and said, "Get back here, girls! I'm not a MONKEY!" I took the hands off as well, and back they came, in various states of laughter and shock.
Then we sat them down and told them, "See, this is what's called a PRACTICAL JOKE. It's not a lie - it's a joke - and there's a difference. There's a difference between fooling someone TEMPORARILY, fully intending to tell them the truth very soon - to be funny, not mean or sneaky - and telling a lie to hide something. Does that make sense? Lying is not good - but a joke is OK as long as you're not being mean, and as long as you tell the other person pretty fast."
They all giggled and chattered about it and then they wanted to put on the monkey hands and mask.
I think it was a good lesson to them - and it was truly hilarious as well!
Same goes for the rake on the roof and the milk and cookies. I always made it clear that Santa wasn't real. My kids never really believed in him - not one of them. But that didn't diminish the delicious excitement and curiosity they felt when they heard that noise on the roof.
They have all told me that those are some of their fondest memories of childhood.