Number of lines based on the number of players. Can warm up first with free dribbling to the lines.
The relay method can be varied: First round, for example, with a specific dribbling technique (outside of the foot, inside of the foot, only one foot, etc.) and dribbling to the line and back. The first in the line/team goes to the 1st line and back, the next to the 2nd line and back, etc. Next round combines passing by dribbling to the line in the agreed manner and then passing back.
The winning line is the one where all players have returned from their round back to the line and have the ball in possession.
Quality factors
Dribbling, touches & speed with the ball. Successful turns and passes!
Key questions
Completing the task to the end, is team spirit visible? Dribbling technique, touches and speed with the ball. Are the passes successful?