This game is so much fun!
It does require you to have "prizes" available. I go to the dollar store and pick up packs of pencils, pens, some fun erasures, maybe some candy, etc.
The grid goes on the board and students each have a piece of paper or a white board and marker.
I have a white board an a marker. I choose a prize and make up some ridiculous price for it. I write the price on the board and keep it hidden (making wild random gestures while writing the number helps discourage kids from figuring out the number while you write it).
A student is chosen (I use names written on popsicle sticks) and goes to the board and chooses a number 1-31 from the bank at the bottom of the screen. The student pulls the number (it will move with their finger), places it in the center of the board and says it in Spanish. I will say whether the number is more than (más de) or less than (menos de) the price I have written on my board. The student moves the number into the correct column. The other students write the number on their sheet or board in the correct column too.
I call another student and the process continues until someone figures out the price. I show the board and give the prize to the student who figured it out.