Like many other animals, rabbits will fight. Also, like many animals, they have some nasty teeth. For this reason, it can be important to keep them separated.
Last month I made a trade with a young entrepreneur and wound up with a few new bucks. So far, they have mostly been doing well, until recently.
This poor guy apparently got his nose bit a few times. We certainly don't want these rabbits getting hurt, so we had to evaluate the issue and remedy the situation. Here is the basic problem.
Do you see how his head fits through the fencing separating the pens? Yup, he'll stick his head into the other bucks cage and then that bugger will bite him! OUCH! For problem-solving like this, I try to incorporate the 
The goal was to build a wall, but I didn't just want to show them how to do it, I wanted them to learn how.
We like to enjoy education in an organic environment that we call life, rather than a sterile environment. If my child is expected to know how to measure something, it won't just be random lines on a page for the sake of measuring random lines on a page.
There is no red "A" or "F" on a page here to show the child if they successfully completed the task accurately. No, they'll have to measure up!
This board was cut to the length marked, based upon the measurement that Pinkie-Pepper took. In this real life example, she learned the importance of measuring correctly. If the board was too long or too short, it wouldn't work for this project. She can see the importance of mastering the skill, rather than just knowing that she either did it correctly or incorrectly.
In the end, some skills were practiced by a few
@papa-pepper and here's the proof:
proof-of-rabbit-safety-wall
@orelmely