Children in a classroom are lined up with their hands on each other 's backs , forming a train .
It is highly unlikely that children are lined up to go on a field trip , and being taught the buddy system .
It is highly unlikely that children are lined up to go on a field trip , and being taught the buddy system .
There is a very good chance that children are lined up to go on a field trip , and being taught the buddy system .
Children are lined up to go on a field trip , and being taught the buddy system .