Entrepreneurship is hard work, but you can’t reach the pinnacle of your success without yourself a opportunity to relax from time to time. That’s why having a hobby is so valuable to entrepreneurs.

The best hobbies are the ones that use your mind, and in November you can start a robot hobby with a big discount. That’s because every day is Black Friday and we offer the Petoi Bittle for 21 percent off the list price while supplies last.

Bittle is a palm-sized open-source bionic robotic dog in the vein of Boston Dynamics’ famous Spot. (Only much more pocket-friendly.) Successfully funded on Kickstarter, Bittle comes with a basic kit to help you put together the puzzle-like frame and download demo codes on GitHub. Plus, the STEM and robotics kit teaches you to code to customize and bring your pet to life by walking, dancing, performing tricks, and more. The four-legged movement gives it more freedom to navigate unstructured environments, while the wireless controls also allow you to take matters into your own hands via Bluetooth.

Bittle’s open platform allows you to merge gadgets from multiple makers in a single organic system using a custom Arduino board. You can also mount a Raspberry Pi or other AI chips via wired/wireless connections to give Bitttle even more capabilities and expand your programming skills. The highly programmable robot uses Scratch, C++ or Python coding and is built on OpenCat, an open source project for four-legged robots. The included Li-ion battery pack lasts about an hour of continuous walking before it needs to be recharged.

Adopt a futuristic new hobby while every day is Black Friday. While stocks last, you can Petoi Bittle for 21 percent off $329 for just $259. That’s the best price you’ll find anywhere. You can also upgrade to a Pre-assembled kit for $269.

Prices subject to change.