The big ones want to carry their little brother or sister sometimes, too. We think, one can absolutely fulfil that wish, but should be sure to pay attention to these things:

• carrying the baby should be an exception, because the child's back is not supposed to bear heavy loads for too long
• the sibling may not walk or run around with the baby inside the carrier
• they must only carry for a few minutes
• and only the older children may try to carry the baby
• the parents are present at all times and hold the baby tight for safety (like one does it, when siblings may hold the baby)
• of course, the instructions of the particular baby carrying aid must be followed