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.
1 Grill the ribs for 2 hours, bone-side down. 2  Wrap them in foil and grill, bone-side up, for 30 minutes. 3  Don't be afraid to add an extra special touch here by pouring a cup of apple cider or juice into the foil packet.4  Unwrap them and grill for 30 more minutes bone-side down.efore we get into how long you should grill your ribs there's one important thing to keep in mind: while dry spice rubs should be applied before you start to cook, sauces should not be applied until the last 20 minutes of cooking at the earliest.