The primary risk in this situation are the fumes from soldering. There are OSHA guidelines for those who solder such as those in the electronics industry. If you do it frequently, good ventilation becomes a necessity - open a window with a fan, install a range-type hood over the work area, etc. If I remember right, lead does not stay in an adult's body over time meaning that eventually, you flush out whatever you have inhaled. For many, just having an open area to work is sufficient and to be mindful of not inhaling the smoke/fumes as it rises from your project. Additionally, personal hygene is important too... washing anytime after working with lead. If you are a maniac about the hobby or a professional that works with it constantly, be sure to tell your doctor to have him include tests for lead in your blood. When caught early, all it takes is a vacation away from lead to make things better. If your workplace isn't well ventalated, a resperator rated for fumes can be used. Children are more suseptible to lead poisoning and should be closely supervised to keep them well. Just being smart about working with lead should keep you free of the dangers.
Here is some more information at:
http://www.atsdr.cdc.gov/csem/lead/pb_standards2.html