Looking for OOP ideas

Here I am again. I still haven't learned OOP and have been feeling
like trying again. What I ask of you this time is ideas for practicing.
It's hard for me to come up with them because I am not sufficiently
familiar with OOP. I would like you to suggest some kind of project
I can tackle to practice as much OOP as possible. It doesn't have to be
anything really useful or practical. The goal is not to make any kind
of application, but rather just practice OOP. I would like something
that requires a lot of repetition, something that forces me to toy
with typical OOP mechanisms over and over. I think I will prefer
using Snit, but I am not really sure.

Thank you for any ideas.

--
Luc

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