What a fun game! Make two dice: one with numbers, and one with colors. Roll the dice, then use dot stamps to make that number of dots in that color on your paper. :} Then, I'd add counting the number of each color of dots to the end of the game.
Because we have no shortage of legos/megablocks. This round of up 30 educational LEGO learning activities shows that there are LOTS of different ways to use Legos for math, reading, language arts, history, science and more!