We've created a 'Starter Test Kit' to help tune in your machine before going for the full build. You might want to check your bed adhesion, bridging, retraction and slicing for fine features.  
Print at ~0.3mm layer height, 2x shells (/perimeters) and 2-5% infill (although should be self-supporting at 0%). Each cracker requires ~34g of material (~4m of 3mm / ~12m of 1.75mm filament). Printed in gorgeous Faberdashery Robot Silver, Pearly White, Space Marine and Mercury Red.   
The Crackers need to be gently eased off the build plate to save them breaking too early and spoiling the surprise. We suggest carefully removing the finished Cracker with Mole Grips (or equivalent) at the base.  For the ultimate festive finish print in two colours, changing filament at 30mm and 70mm layers (Use Z-Pause if your machine supports it). There are three different surprises in each cracker, that all print-in-place. Once you've pulled your crackers you can turn the ends around, string them together through the special holes and hang on your tree as a cracker decoration!  

Faberdashery are releasing daily, seasonal designs for you to print and enjoy. Join in the fun with our 25 Days of Making!
http://www.faberdashery.co.uk/25-days-of-making/
This is Make #25 of 25.  

Seasons greetings from everyone at Faberdashery!