Question: Attract a lot of ants
Option 0: Fill a small container with some water.  1 oz should do.  Add powdered laundry soap to the water until no more can be dissolved.  Place the soapy water on the ground or floor where you want ants to appear.
Option 1: Fill a small container with some water.  1 oz should do.  Add sugar to the water until no more can be dissolved.  Place the sugary water on the ground or floor where you want ants to appear.
Answer: 1