T his might look hard, but is really easy to fold up and it will fit in a regular envelope. Not sure who Sally Nusbaum got it from but she was my inspiration.
How to cut the paper:
Cardstock- 3 4 x4 squares each scored diagonally
DSP- 3 3/4 x 3 3/4 each cut diagonally (one triangle is scrap)
White- 3 3/4 x 3 3/4 for inside plus scraps for penguin and sentiment
assemble as shown- place just under the score line.