I have my students do this activity in a way that gets them moving around and keeps them engaged.
Print out these dominoes on either card stock or laminate them. You may want to print out several sets and mix them up. You can write numbers 0-12 on either large brown paper grocery bags, large buckets, or something similar. Place them out on a large table, carpet, or empty space. Have them count the dots and place the dominoes in the matching bag.
In the beginning of the year, I encourage my students to touch and count each dot. As students improve in their number sense, I have them try and practice counting on (looking at one side of the dice and holding that value in their head while they count on the number on the other side of the dice). I also have them practice their number facts/combinations.
Another way to use these is to have a student get one of the dominoes and draw a picture that represents that number and figure out other number combinations that can also equal that number.
I would also suggest writing the number on the back of the dominoes so that students can self check if they are counting them correctly. These can also be used in a similar way to flash cards.