We made them for my family to have with Thanksgiving dinner, and they were a huge hit.
They're not complicated at all, just 3 ingredients over ice: mint, lime, and Sprite. I would suggest using the imported Sprite, it just has a slightly different taste. Sweeter and less fizzy, I think. I was able to buy it at Walmart, no problem.
I used about 8 leaves of mint, and crushed them up a bit in the bottom of the glass with the handle of a butter knife, then squeezed in a quarter of a lime (dropping it in the glass as well), topped with ice and Sprite and stirred a bit.
These virgin mojitos are great for parties and holidays, or to make a meal a bit more special.