Today was a rainy day. The children had to stay inside. We showed them how to make envelopes from old magazine pages. I used this template available on etsy. http://team.etsy.com/downloads/envelope.pdf
I just printed it out on card stock, then reduced the image to 85% on the copy machine so that it would fit National Geographic size pages. The children flipped through the magazines until they found a picture they wanted to make an envelope from. Then they outlined the template, cut it out, folded and glued their own envelopes.
Rainy days are good for crafting.