Children's Sermon-The Real Egg

Which is the real egg?
Prepare ahead:
Blow the white and yolk out of an egg. Do this by making a small hole in each end, putting your mouth over one end and blowing the contents out.
Open a plastic egg and put the contents of a real egg inside. Only fill the bottom half so you don't have a mess.
The sermon:
Hold up the empty egg in one hand and the plastic egg in the other. Position your thumb and forefinger at the bottom and top of each egg, so that the holes in the empty egg can't be seen.
Ask the children which is the real egg. They will, of course, point to the one which is actually an empty shell. Ask them what makes an egg a real egg. Guide responses as necessary to get at the idea of having a shell, having a white and yolk, etc.
Now turn the "real egg' so that they can see the hole. Then wrap your hand around the egg and crush it. (They will be surprised that you haven't made a gooey mess.)
Tell them that you have tricked them and open up the plastic egg revealing the white and yolk contents.
Talk to them about the fact that we can be fooled by how something appears on the outside.
Ask them what makes a Christian a real Christian.
Guide responses:
Does coming to church make a person a real Christian?
Does being able to quote a Bible verse make a person a real Christian?
Does saying a prayer make a person a real Christian?
NO....it is what is on the inside.
A real Christian is a person who has asked Jesus into his heart, who knows he is a sinner and that he needs Jesus help. (Expand depending on age of your audience, etc.)
Don't be fooled by what is on the outside. (You can add comments to encourage children not to be judgmental or judge based on external appearances.)