Video Presentation

How it works

The spider is mounted on a linkage mechanism with two springs. These springs are built in a way to be lock on the downer position, but start to push as soon as the system is triggered. The trigger is made with a rotating lever connected to the crank which pushes the parallelogram. The openable top part of the box is also spring loaded to help to open it and keep in open position. You have to make several rotation of the crankshaft in the way you can not know when the spider will jump.

It is a perfect build for LEGO fan or children for Halloween. If someone comes to your house to ask for candy, ask him to just turn the crank of this box before…

You can read the full review of this model on my blog.

How to build ?

You can either follow the video above or purchase a PRO PDF instructions (with partlist at each step in a same way as LEGO do) only on this shop and build it with your LEGO parts, or purchase the complete package including genuine LEGO parts plus PDF instructions, on Buildamoc shop, for you or your children.

The instruction contains the partlist at the end, but you can check individually on Rebrickable, or in the instructions previews below.

About this product

Instructions preview