I'll show you how to make an awsome mini knife easy stuff to find around the house.
Step 1: Materials
Duct tape(color optional)
3 paper clips
Razor blade(from most box cutters)
Step 2: Step 2
Take one of the paper clips and put it through the little hole at the bottom.
Step 3: Step 3
Start wraping the paper clip you put though the hole till its thick enough and stays secure.
Step 4: Step 4
Add the second paper clip and start wrapng until its secure.
Step 5: Step 5
Keep wraping till every thing is tight and secure.
Step 6: Step 6
You can make a sheath in any way you like but I would recommend the type I made(make sure your sheath is nice and thick so the blade doesn't poke though).
Step 7: Step 7
You know have an awesome blade