I haven’t made anything for quite some time.
However, I did see this toddler busy book that looks SO great and doesn’t require a whole lot of sewing, just fusing. However, I noticed on there that she said she used heavyweight felt for some of it and I’m just curious how important that is? She also uses heavyweight non fusible pellon for the pages as she says it holds up better than felt in the long run. Hmmmm. Thoughts?
http://servingpinklemonade.blogspot.com/2011/01/quiet-book.html
Finally Finished 
I think that if I made it, I would use the regular old cheap felt but maybe use stabilizer so it’ll make up for the thinness. Thick real wool felt is expensive and hard to find (unless you go online). The non-fusible stabilizer as the pages is a great idea! Joann’s has all that Pellon stabilizer, and sometimes it goes on sale. Or you can use a coupon.