Re: Question on the making of hookahs.
I don't think there is any danger of transferring any sort of materials from your hookah to your child. As others have already said, the biggest hazard is lighting coals and smoking in the home.
I have a seven year old and I keep my tobacco and coals far out of his reach and I don't smoke anywhere near his bedroom. That means I typically have to smoke outside or wait until after he's gone to bed.