Knex Calculator

This, as the title suggests, is a calculator made out of knex.  It is extremely easy to use and requires a small amount of parts.  It can add the numbers 1-9 to create instantaneous answers of 1-18.

Step 1: Body

Step 2: Processors

Step 3: Processor Track

Step 4: Display, Installing the Mobile Processor, and Building the Addition Wand

Step 5: How Do I Use It?