Old School Shirts For Upcycling (North Sheen TW9)

Offering 3 old M&S "white" school shirts, for upcycling purposes.
They are Size 12-13 years, and made from 65% Polyester and 35% Cotton.
All three have noticeable paint stains on them (acrylic paint I think, but I haven't been able to get the stains out), and therefore are no longer suitable for school uniform purposes. However apart from the stains shirts are in reasonable condition and so could possibly be upcycled into something (perhaps for costume purpose or some such).