Identifying fruit

Question

A small citrus tree grows near my son’s classroom in Chandler, Arizona. They refer to it as the weird lemon tree, with a super bumpy peel, and more dry inside than a typical lemon that you can juice. They let my son pick one. It is larger than most lemons at the store. We cut it and it is somewhat dry, not for juicing, and has large visible pulp pieces (I don’t know proper vocab) within all the sections. What is this fruit?? Could we make something with it to teach the kids how it can be eaten or used in cooking? Thank you!

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Answer 1

This is Citron fruit.
Here is a link with more information.

https://www.gardeningknowhow.com/edible/fruits/etrog/growing-etrog-citron-trees.htm