Yes, even this design can be a FREE download once I am fully funded for my RoboGuts™ S.T.E.A.M. Education Program Kits;

IF each viewer donates just $5 I'll be funded almost overnight and then all my designs become FREE downloads!  

The fastest and cheapest way to get all my .STL files FREE is to donate $5 to help fund school materials ... once I have $3,500 I'll convert all these files to FREE downloads.   https://www.gofundme.com/roboguts-kits-lessons

Summary This uses four legs to walk almost as if it was only two legs taking steps ... It's just for fun ... It's all MakerBotable ... This is another of many entries to the makezine.com/go/makerbot contest ... blog.makezine.com/archive/2010/04/makerbot_giveaway.html Instructions After you MakerBot this add two continuously rotating servos ($5-$20), a channel mixer ($10-$20) and R/C control and walk it around making your cat or dog nuts ... If you successfully make this with a 3D printer please send me the build-file and machine type so it can be uploaded here for others to use.