Kingdomino 5x5 border boundary using straws

In the Kingdomino tabletop game, I've found it challenging at times to show a new young player who's just learning how to count that they can only be 5 spaces up and 5 spaces across... so, OK, maybe it's overkill... but assembling a square comprised of four 6.5mm straws & four L-bracket corners, you can construct a perfect square bracket that can show the player the boundary limits of their intended domain in Kingdomino. This just makes it a bit easier explain and perhaps even works as a play a