First off - congratulations for adding to the resources available for parents to get their children reading early.

I also know a self published author who just recently wrote a workbook to help teach young children the number line. I hope you don’t mind if I leave the link right here for parents that are looking at books for their children.

https://www.amazon.com/dp/B09538HDWW?ref_=pe_3052080_397514860