Step 2: Create mat
Lay down a strip of duct tape, face-side up. Then, lay another face-up piece along the long edge. Repeat once again to have a 3 wide mat, then lay a 3 wide face-down mat perpendicularly on top of the face-up mat.
You should now have a mat with the sticky-sides faced together, giving you a two-ply non-sticky 3x3 matrix; this will be the container for the water which will float the cork and tell us our direction.
You should now have a mat with the sticky-sides faced together, giving you a two-ply non-sticky 3x3 matrix; this will be the container for the water which will float the cork and tell us our direction.
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