I made these out of a scrap of 2x4. I cut the grooves in the knife body using my table saw; offset the cut 1/16th from center, and ran the cut both ways to get the grove wide enough to hold the blade. The knife blades are about 1/16th wide. I drilled pilot holes in the knife body for the screw (otherwise the pine splits) and then drilled a slightly larger hole in the knife blade so it pivots cleanly. The washer is used so the screw doesn't protrude out the back side of the knife, not because the screw moves at all.
The finger slots (where you reach in and pull the blade out) took about 10 seconds with the sander attachment on the Dremel.
All things considered, I'm quite happy with the way these came out. I got this idea from a scout mom's blog. She made fake knives out of cardboard and put red lipstick on the blade, then had the boys practice opening and closing. If they got any lipstick on their fingers or hands while doing that, they had cut themselves my not using the knife properly.
Not sure I'm going to let them put lipstick on my nice wooden knives though...
I left the kits un-assembled except for my demo model. The boys will get to put their own knife together at an upcoming den meeting. All they need to do is put the blade in the knife body, line up the holes, and insert the screw. Should be fun!
If the blade moves with a screw, you couldnt tighten it down so it wouldn't move. Or lock it in place for the race.drathbun wrote:our rules prohibit moving parts on the cars