I think I'll have to take look in my indoor gear drawer, i know I have a bunch of props with lightly split ends and such, and I sure have plenty bamboo skewers stored. Bit of hot glue and my 7-year old ought to be amused for quite some time. Neat idea.
My 0.02 €:
I've got a nice big 15x4 APC prop from my glowengined 3D plane, that lost a blade in a less than fortunate emergency landing and just ended up in the start box at first. I turned it into a ground anchor for field ground testing (and safety anchor for fiddling with electric models under power) on the spot. I used a looped up yard and a half piece of heavy gauge nylon filament line from the field bin, but any suitable strength line will do. Hitch the line through the prop bore and over the remaining blade, peg it thoroughly into the ground and put the line loop over the model tail. The sharp APC blade cuts the turf like a knife blade, and its easy to get back out as well, just put a foot over it as a stop and pull the line. None of my planes have been able to even move it a little in the ground to date, and it'll stay in my start box.
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