Looking for books/recources for children about Islam

Hello everyone,

I have 2 kids (13 and 11) who are going through questioning period of religion so on. I would like to provide some well written resources to provide answers to their curiosity, I would greatly appreciate if you can share you favorite ones.

Please no recommendation that focuses of punishment, burning hell, so on.

Best,

Filiz

Here is a good one http://www.alhudaonlinebooks.com/islam-for-children-p-100.html