I know it's supposed to be much better, but the idea of vaporizing lead anywhere remotely near where kids may someday play is pretty intimidating. Are there any useable lead free solders?
Just don't put the solder in your mouth and wash your hands.
Here is one stack exchange answer that seems well researched to me: https://electronics.stackexchange.com/a/19086
I also did a lot of googling on the subject recently when I decided I wanted to try out Stained glass, but wasn't sure what precautions I should take. I've come to the personal conclusion to not stress about the lead in solder.