Working with radial reaction in grid described in Material motion spec.https://www.google.com/design/spec/motion/choreography.html#choreography-radial-reaction
Had a quick idea and gave it a try.http://share.framerjs.com/rwcughd24v7k/
It's not necessarily "radial" though. (more like diamond shape) It may be enough for prototyping purpose, but curious if there'll be a better model.
And with a little bit of sound, it is even more fun :)))))http://share.framerjs.com/jl6ziby82gy6/