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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This is the best beginner Kata I've come across yet.
It lets the student build the class, it has clear instructions, and it has readable tests.
It also can't be solved with one quick method call, which many beginning Kata's suffer from (intentionally).
The truth is many things are simple, and knowing that is itself valuable.
But I can agree with pointing a couple steps away from the exact method, to build the habit/skill of searching for the simple answers.