Hi! I'm Sarah and I make and sell quiet felt busy books! I share tons of templates for free and teach how to make busy book activity pages here on my channel, as well as fun felt crafts.
Links to all the products that I use and buy personally for replenishing materials regularly are in my amazon storefront:
www.amazon.com/shop/diybusybooks (If you are in the US or other)
www.amazon.ca/shop/diybusybooks (if you are in Canada)
I mostly use 1.2mm stiff Korean felt for the pieces, which can be purchased at www.bambinobusybooks.com.
If you also want to make and sell busy books and have a cutting machine, such as a Cricut, consider joining my Patreon for all the templates I use to make my most popular and profitable activity pages in bulk.
www.Patreon.com/DIYBusyBooks