What are some alternatives?
When comparing Blocks and Kodon, you can also consider the following products
Moto 360 - The round smart watch is finally here.
A-Painter - Paint in VR in your Browser
Apple Watch Series 2 - The new Apple Watch
Oculus Medium - Sculpt, model and paint in virtual reality on a 3D canvas.
Tic Watch Pro - A dual screen smart watch with 5-30 days on a single charge
MasterpieceVR - Powerful VR sculpting & painting tool