|The box has very cool graphics with few parts|
You'll need a helping hand to assemble this crazy robot hand, which is not entirely possible to assemble the way the instructions intended.
The kit is called Robotic Hand and is made by Kid Labs 4M and recommended for ages over 8. The price was about US$16 and was purchased overseas.
The parts for assembly had no shortages. The kit included one extra finger tip, as if they knew the finger tip would not work.
In fact, there are several flaws with this kit. One, at least two of the finger tips are too large to fit the finger tubes, which likely had mold shrinkage during the manufacturing process. The others didn't full fit the tubes either.
|Showing knots in two nylon chords|
|Above, the wire was substituted for the nylon cord|
|At top, a finger tip does not fit the finger tube|
Next, the nylon fishing string had problems. It was too thin, stretched, knots were very tedious to tie, and would slip, and it was very difficult to handle. It was obviously a poor choice of string material for the kit. What was needed was a wire that would have minimal expansion and stretching.
The next problem that resulted, because the design calls for two sets of two fingers to be moved two at a time, the location recommended for tying the knot was next to
|Finger tubes must be rear seated|
As far as the finger tips are concerned, this problem will be solved with another kind of superglue, gluing the tips in place. Also, due to the thicker wire used, five finger tip holes need to be drilled to accept the larger diameter cord. We're still working on this project as it involves a lot of work, a power drill, a bench vise, wire cutters, and is not suitable for children.
4M Industrial Development Limited