If "Twiszip" is a character from a story or a specific step in a complex model (like a 3D puzzle), please share a few more details so I can give you the exact steps!
This project uses the method, which creates a sturdy paper cube that "zips" together without glue. What You'll Need: Part 3- Twiszip
: Tuck these triangular flaps underneath the "door" flaps you created in step 2. This "zips" the unit shut. If "Twiszip" is a character from a story