This Christmas, I got the Go Cube as a gift for my 8 yo son but I’ve been hogging it and it’s been a ton of fun. Source: over 1 year ago

In 1981 I could solve my original Rubik's Cube in 75 seconds. I thought that was pretty good, then a teenager friend of the family did it in 45 seconds. I can remember doing the top and middle level, but I need to re-memorize the moves for the different patterns on the bottom. Several years ago, I bought one on a Kickstarter for Go Cube. You might like to take a look: https://getgocube.com/. Source: over 2 years ago

Since you have permission, you should check out the GoCube, either at speedcubeshop or from GoCube directly. Source: about 3 years ago

Apache Karaf with OSGi works pretty nice using annotation based dependency injection with the declarative services, removing the need to mess with those hopefully archaic XML blueprints. Too bad it's not as trendy as spring and the developers so many of the tutorials can be a bit dated and hard to find. Karaf also supports many other frameworks and programming models as well and there's even Red Hat supported... Source: about 3 years ago