This toy is incredible. It is reasonably easy to construct things, while still providing a challenge once you get the basics. It is suitable for nearly all ages. It says 3+ but if you remove the smaller parts it is suitable for much younger children even though they might just enjoy tearing down your constructs. The absurd thing is that when they do, you wont hesitate to make another one, since building these are way too much fun.
The easiest way to do it is to add the files normally:
Then refer to it using inline script like this:
<script><!-- //Use script here --></script>
This can of course also be done in several other ways, using WP functionality, but those are all not very satisfactory in my opinion, and they do not fit JS that will only be used in a single post.