2 pounds chicken breast tenderloins or strips (chicken tenders save some time, but it is a lot cheaper to make your own chicken strips out of boneless skinless chicken breasts)
If using wood soak skewers soap them in water for at least 30 minutes, the longer the better.
in a small sauce pan mix together the pineapple juice, brown sugar, and soy sauce. Cook mixture over medium heat just short of a boil; remove from heat and allow the mixture to cool enough to handle. Place chicken tenders in a 1-gallon food, grade disposable bag, and pour the sauce mixture over the chicken in the bag. Refrigerate for at least 30 minutes.
Preheat and prepare grill for medium-high heat, and lightly oil cooking grates.
Thread the chicken lengthwise through the sewers and grill for 5 minutes on each side or until juices run clear.