Do you fancy a cup of tea, whilst being involved on an activity? The aim of making a cup of tea is to combine communication skills and the ability to explicitly instruct another group member to complete the activity. This allows children to better understand their environment, team and focus on their communication/listening skills.
Pick two members from the group, and give them the job of either the 'instructor' or the 'doer'. The instructor has to give explicit instructions to the doer in order to complete the task. The doer has to do exactly what they are told. The task is to make a cup of tea. An alternative way to making a cup of tea is to do it outside over an open fire.
Highlight to the group that instructions, even unaware, should not put the doer in any harm. Make sure you're adhering to best practise with regard to fire/group management around a fire.