2 teams with a net in between and 1 ball. Use oh catching and throwing motion to play to each other. Catch the ball with your hands on the side and do not press the ball against your body! If you throw, make sure they step out and throw the ball along the body over the net.
4 teams and then idem above. When the ball is over the net you change places. Check first if this goes naturally. If not, explain that one goes in front and the other behind and that you always look at the opponent! We take 1 field of level 3. It is 2 against 2 and the one who is finished leaves the field and then the reserve team may enter. Who will stand the longest?