Group 2: for children weighing 15 - 25 kgs (33 - 55 lbs), roughly 4 to 6 years. Booster seats that only fit into Group 2 are less common. Most are group 2 and 3, or groups 1, 2 and 3. Groups 2 & 3: for children weighing 15 - 36 kg (33 - 79 lbs), roughly 4 to 11 years.
Broil the ribs for about 5 minutes, until the sugar in the dry rub is bubbling and the ribs are evenly browned. Bake the ribs: Set the oven to 300Â°F. Move the ribs to an oven rack in the middle of the oven. Roast for 2 1/2 to 3 hours for spare ribs or 1 1/2 to 2 hours for baby back ribs. Halfway through cooking, cover the ribs with aluminum foil to protect them from drying out.
Dissolve salt and sugar in water. Place ribs in brine and refrigerate overnight. Remove from brine, rinse and dry with paper towels. Rub with spice mixture of your choice. If grilling, use medium heat and grill for about 1 hour or until very tender, turning often. Ribs can also be oven-roasted at 275Â°F for about 1 1/2 hours or until nicely browned and tender as desired.