Kids are great! One of their many assets is that they're a great audience for magic. Their jaws drop when you wave your hands and the supermarket door opens. When I did that for my son for the first time I thought he'd faint. He was positively awe-stricken. I was expecting him to kneel down and worship me as a white god. My favorite trick of all though, was the disappearing nickel.
It's almost too easy. You put a nickel in your palm and tell your kid (my daughter in this case) that you're going to make it disappear right infront of her eyes. Now kids aren't stupid, and they're likely to say something like, "Piff! Piff! C'mon Dad, nobody can really do that! I wasn't born yesterday!" It's important to little kids that you know they're worldly and not to be trifled with.
So you say to the kid, "No, I mean it! It's real magic! Just watch the nickle closely and it'll vanish right infront of your eyes. " The kid gives a skeptical look. "Here it goes...keeeeep watching...!"
The kid's face gets closer to your palm. "I feel it starting to disappear...It's starting to ...yes, there it goes...Oh my God, it's...it's...!" Then sudden;y, "HOLY COW! WHAT'S THAT BEHIND YOU!?" Huh? She turns to see what you were pointing at and you pocket the nickel! When she looks back again the palm is empty. Klong! The kid is flabbergasted! Nothing to do now but sit back and receive waves of awe and adulation.
Gee, I miss that. Kids have a way of making you feel like a king. BTW, the kids in the pictures aren't mine, I got them off the net.