This is one of the first actual objects I have coded with openSCAD - I'm just learning so it took forever, but I'm quite happy with it. It's based on the multi part one posted by acvarium but made the grabber end in one piece.
Unfortunately my printer glues the whole middle section together as I've not left enough clearance for my homespun cobbled together printer, plus I can't print overhangs yet as I've got no cooling.
Someone else may have better luck though. If you want to try it and let me know if it works that's be great. There's slots for elastic band and pull string

Once I've worked out overhangs and how to print correctly without too much support I'll give this another go.
If anyone wants it I can give you the openSCAD code too