This is a 12-roller robot 3D-printed DIY omni-wheel - a part of Kiddo companion robot. This open-source design incudes 3MF, STL, STEP and SolidWorks files.
Meet Snoopy, an open-source pet robot! Snoopy is a 300mm, round-base, mid-size DIY 3D-printable indoor pet robot compatible with Kaia.ai software platform.
If you 3D-print PLA only, I don’t think you need a dryer. But if you print just about anything else - PETG, ABS, ASA, Nylon, TPU, polycarbonate and so on...