We just got Ninjaflex filament in the store and are having a ton of fun with it. It is super squishy and perfect for making car tires, bumpers and cell phone cases. We wanted to print a ninja, so we used the official mascot of Pumping Station One's CNC Build Club: The CNC Ninja Squirrel.
We printed a few of them at about 40mm tall.
Next came the fun part. We tried to torture them to death. We could not kill them. Ninjaflex is pretty cool stuff.
We printed it using our MakerBot Replicator 2X. The default lines came out rather thin so we created a custom profile for it. That profile is attached below. Unzip the file into the [username]/My Things/Profiles folder and you're good to go!
The profile is on the product pages of the store.
You select the profile from the dialog "Make" box.