match day warm ups U15 girls

Hi FA community,

I am transitioning from linesman to assistant manager this starts (commences this Sat 7 Sept).

I will mainly be responsible for match day warm ups (approx 30-40 mins). I am currently doing the introduction to football coaching course, and I am aware of the STEP principle, and have some ideas provided from the live webinars on this course. 

Looking for ideas to help the girls develop their footballing skills and team-work (they are of mixed ability), and ensure the session is fun.

Any ideas most welcome:)

Thanks,

Scott