Ten Frame at Illuminations
Thinking about numbers using frames of 10 can be a helpful way to learn basic number facts, develop number sense. and to develop counting and addition skills.There is also a Five Frame Applet too.Here is a link to this great applet at Illuminations.
I HIGHLY recommend it. Lastly, it's free and can be used in your computer lab at school. Once your students play it, they will want to play it at home too.