Telar de cartón - Recycled crafts for children.
Weaving techniques that might be helpful (not for card weaving but for weaving where the warp threads are spaced further apart. This board is very useful for details about weaving. (For stories about Peruvian children and adults weaving
This is probably my most favorite post yet, because it is a way to use up all those left over yarn tails and have fun too!