It is very simple. Not very effictive agiasnt people who search the ground. Can be very effictive in hidden areas.
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.
Step 1: Step 2: Materials
Read the signs!
Step 2: Assembly
Follow the pictures.
Step 3: Tested Myself and WORKS!
It works! (even if i blew up the tnt with flint and steel) plz plz plz comment!