As mrsnoah says, child centred means putting the child literally at the centre of everything you do.
So your whole ethos is built around the needs of the child - rather than the needs of the adult or of the routine of the group or even other children in the provision.
If the child is interested in dinosaurs and does not want to join in singing because he wants to continue playing with dinosaurs you should consider how you can meet his needs - he might enjoy a tuff spot or messy tray filled with dinosaur land resources... he might enjoy singing dinosaur songs... he might look at a dinosaur themed book... but if he does not want to leave his play to join in with a group activity would it be the right thing to make him?
Hth
