SpikenzieLabs
The Limited Edition Halloween Pumpkin Useless Machine is a great kit to build with kids that love Halloween. This "scary" machine acts like there is a little ghost inside turning itself off every time you turn it on.
This version of the Useless Machine has been refined for a clean design and ease of assembly. There is no soldering required; all you need is a simple set of screw drivers and 30 minutes of time. 
Be aware - playing with the Useless Machine is highly addictive. Don't say we didn't warn you!
The Halloween Useless Machine has these great features:
- Easy to assemble
 - No soldering required (Pre-assembled circuit board, use only a screw driver to attach battery and motor wires)
 - Clean laser cut acrylic design.
 - The motor and switch assembly is one piece (The motor, arm, both switches, LED lights and screw on battery terminals are all part of the same activation unit.)
 - Two color LED arm lighting (Green LED while the arm is going up and red while it is going down)
 - Robust and smooth hinge design
 
What's included in the kit?
- Laser cut and etched acrylic adhesive backed Pumpkin.
 - Laser cut acrylic case, arm, and motor mount.
 - Motor
 - Battery holder
 - Assembled circuit board with screw terminals for attaching batteries and motor
 - Door pre assembled with robust 1/4" acrylic hinge
 - Large Silicone non slip feet
 - Hardware pack with screws, bolts, washers, stand-offs, Velcro and nuts
 
Not included but necessary to build The Useless Machine
- Small size Phillips screw driver (x shape)
 - Small size flat blade screw driver
 - 3 AAA batteries
 
Documentation:
Build Instructions: The Useless Machine Instructions Guide