This is a classic question and the answers are not clear cut- which is why this topic crops up every so often. There are arguments for both sides of the coin. You have to pick the side that speaks to you.
Its a similar argument that people have when decided if they should vaccinate their kids or not. Some say inject that smidgen of a disease into my kid- chances are that its dead and then he will develop a resistance to it.
Others say there is no way I am willing to take the chance. There is a teensy small possibility that the vaccine will actually cause the disease. (BTW- this seems to happen often enough with the flu shot)
So should you give your children a small glimpse of the goyish world, so that they could see that it is hevel? Or is the risk too great to take?