After using it for two years as a parts pack, I decided to reassemble my EV3 set to create a Robot. It’s not technically my first Mindstorms MOC, but it’s the first one that I’ve 100% both built and programmed myself.
And I gave it a VERY important and fundamental use: to place Dominoes! 
Before I get to the model itself, I want to clarify that it was designed specifically to hold Haba Dominoes, which are made out of wood and have stupidly convenient proportions that allow the pieces to fit perfectly in a 3 wide Technic slot.
The Robot can hold one stack of 11 Dominoes at a time, and can go straight or turn left and right, and can be controlled manually by waving a hand or an object in front of the IR sensor, or using the Beacon.
BTW, if you’re not familiar with Mindstorms, this is the IR (Infrared) Sensor. It can measure distances and is also the receiver for the Beacon.
And this is the Beacon.
Three motors control the Robot: two large ones for moving and steering, and the medium one for the placement of the Dominoes.
The Dominoes are held in this slot. A moving beam slides them out carefully (and also doubles as a holder when the Robot turns right, otherwise the Dominoes would slide out while it’s steering, you’ll see what I mean in the video), and an L shaped thingy prevents the pieces from toppling while sliding inside the slot.
#####yes, I know, I’m really good at explaining things…
Here’s a video I made that shows in detail the Robot and how it works!
It’s the first video ever that I’ve edited and put together, so please don’t judge my skills too much 
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And there we go! Leave a comment and tell me what you think of it, and also a like if you liked the MOC. Bye!