I got it off of Amazon! It’s a cheap little thing but I find it works pretty dang well.

JRium Gypsum Ant Farm - Observe Live Ants at Home | Educational & Learning Science Kit for Kids | Watch Ants Social Behavior https://www.amazon.com/dp/B08GJGN48G/ref=cm_sw_r_cp_api_i_RY7ZRF8YZ61TWCJD6AWB