I've started making a collection of Harry Potter DIY props and this is one of them. You'll find the template in the link above!
P.S i haven't done the cellophane yet!
Print out the template provided at the right size for your face.
Cut this out and trace onto your thin cardboard. Cut it out!
Glue your template onto your cardboard. Cut any rough edges.
Bend a little of the end of the part of the glasses that goes on your ear and glue that tab to the sides of the glasses.
Cut out one red cellophane circle and one blue cellophane circle, the same size as the glasses look- through bit...circle. Add 0.5cm extra cellophane to glue it on.
Finally glue the cellophane circles onto the glasses part where you look through...