If you look at the links I have shared for the coloring pages and dot sticker workbook, you may notice that there is not a coloring page for the number 9. I didn't want to skip coloring on 9 day so I just googled it and found some pretty good options. For the dot sticker workbook, the site I got it from recommends putting the correct number of dot stickers on the corresponding number. Since I didn't want to focus on counting for these activities, I just let Izzy put however many stickers he wanted on each number. However, I do plan on making him another book and using it as suggested in a few months.
Some other fun things we did for number recognition were building the numbers out of legos (though my lego building skills aren't great, so you don't get any pictures of our attempted creations). And just like for shapes and colors, we had a chart with the numbers on it that he got to put a sticker on every night. If you want to try the lego activity, this site has some great patterns to follow. As for our number chart, we used some Frozen printables we found here.
Cost: $2 for stickers
Rating: 3 out of 4 stars (for all activities combined)