When I was a child I was good at school and my sister was not. My parents sent her to different places to get help with this problem. One was a nice old lady who gave little lessons to young children and she mainly uses the Luek boxes. I have heard about it and asked my parents if I can go with my sister. I had so much fun, but the lady told me after some time that I am good enough and that her resources are done, means she did not know how to teach me any further, which was sad.
The little books you can buy for learning with the Luek box are mostly for young children. I have the idea to offer these for more advanced topics. They can be greater in size and designed for elder children and adults accompanied by books containing a more advanced type of problems, like chemistry and physics or languages.
I mostly did not think much about the topic but more about having the pattern right and beautiful in front of me, which was the main motivation. This may sound not very professional for teachers but it is a fact and maybe many learners feel like this.
Lueck also exists as a software for mobile devices, so that you can learn with Luek anywhere, but I imagine that people rather have the box and a book with challenges.
Still, I never would be allowed to create the above, because of the rights Luek owes. I certainly have to think out something similar but different enough to the Luck idea.