A small child wearing a helmet is in a baby carrier that is on the floor.
The child is wearing a helmet because it is going on a bike ride with its mother soon.
Just because a child is wearing a helmet doe snot mean that it is because it is going on a  bike ride.
A child wearing a helmet does not mean it is going on a bike ride. The child may not be with its mother.
The child may not necessarily be wearing a helmet because it's going on a bike ride with its mother.