Being able to add within 10 is essential during the early years of schooling, and the basic facts of addition are a baseline during later work with subtraction, multiplication, division, fractions.
In my opinion it is very important to visualize the addition worksheets, in that way students would easier adopt content.
Each worksheet that I make contains visual learning. Particularly as I work in a bilingual class where it is very important.
The goal is for most students to know, fluently, and with automaticity, the addition to 10.