Print a colour photo of each child, then print the same photo in B&W (or photocopy it). Cut one photo into strips (about 1.5-2cm wide) vertically. Cut the other into strips horizontally, (best to make it 3-4mm thinner than the vertical strips as they go together easier). Weave both photos together. It looks amazing. Mount onto coloured card when finished. I use this with Year 6 students.
Jan Preston's Blog 