Cut a sheet of tin foil to the same size as the A4 cellophane. Choose two colours of cellophane and sandwich the tin foil between them.
Lengthwise fold the 3 layers in half or nearly in half. Folding the sheets in half will mean that all the tassel lengths are all the same.
From the open end cut strips towards the fold being careful not to actually cut through the fold itself. Continue cutting strips all along the length of the sheets of cellophane and foil.
Wrap the cut cellophane and foil tightly around the end of straw using sticky tape and secure it.
Continue rolling until all of the cellophane and foil is tightly wrapped and stuck around the end of the straw. Gently open out all the individual layered strips to give a wonderful pom-pom like head to your homemade firework sparkler toy.