It's often very tempting as parents to step in and help your child lose that loose baby tooth. Some may try string and a slamming door, or some have even tried a string and fancy rocketry to help pull those loose teeth. We would recommend the old tried and proven technology called the "kid wiggle" method. ; )
Most loose baby tooth are easily taken by a persistent wiggle by your child. Yes, there are those rare teeth that may be too crowded by their neighbors and your dentist may be needed to help remove these, but the majority of children have very good success removing their own baby teeth by a persistent wiggle.
Check out this article from Katherine Lee on www.About.com with some information from Dr Ed Moody, past president of the American Academy of Pediatric Dentistry.