It's very easy to make up the counting boards, and it's a good time for finding paper doilys on sale too. The stickers are so the kids can self check their work. In my classroom I had a large number line stapled to one wall, that they could also refer to. These are laminated for durability, but if doing this at home it's probably not necessary.
All the kids have to do is place the right number of "snowballs" i.e. cotton balls onto the the large snowflake. I like how they can see the numeral, sight word, and visual representation of the number all at once. ER is fairly proficient at counting out and representing numbers to ten. So as I stated at the top, I make a point to point to the number and finger trace it in the air while we do this activity.