What are some alternatives?
When comparing Kodon and Blocks by Google, you can also consider the following products
A-Painter - Paint in VR in your Browser
Snap Art - Snap's augmented reality platform
MasterpieceVR - Powerful VR sculpting & painting tool
Tilt Brush by Google - Paint in spaces around you with Virtual Reality
Oculus Medium - Sculpt, model and paint in virtual reality on a 3D canvas.
ScrollMagic - The jQuery plugin for magical scroll interactions.