<p></p><div><div><div><div><div>This project was inspired by Jonathan Rochelle, who also has an excellent design for a snap-together bracelet for kids.<br><div><br>This is a conceptual derivative of Jonathan's design. I did not use any
of his files, rather I designed something similar myself after looking at his
photographs and description.<br><br>There are two styles of empty block units that link together like Jonathan's, but they have
no top part. Then there is also a press-fit top that can be customised
and pressed onto each block.<br><br>Each block is linked to the chain
with an easy place-and-twist action, so long as the blocks are held at
90 degrees during the linking (see photo), but then the links won't come
apart by pulling or shaking them.<br><br>The earlier version was not very stiff, and tended to bend too much when joined. This version is stiffer - a bit harder to join but also much harder to accidentally come apart.<br><br>There is also a special pair of click-fit joiners for easily closing and opening the bracelet with one hand.<br><br>The press-fit tops are designed with a tight tolerance, so they will need to be pushed in hard, and they will not pop out without a lot of force.<br><br>I have included STL files for the digits 0-9, and capitals A-Z, and a star design. This should give most kids a fairly good start with the bracelet.<br><br>The
idea is that a bunch of the generic blocks can be pre-printed, maybe in
many different colours, and then the kids can have customised press-fit
tops to add them in whatever order they like onto a linked bracelet for
themselves.<br>Each empty block takes about 7 mins to print on my
Printrbot, and the press-fit tops need less than 5 mins each. There is
no support material option required with these prints.<br><br>UPDATE: 12 May 2015 - fixed an error in with Block Unit 2, and reuploaded Sketchup file and STL file.<br></div></div></div></div></div></div>
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