Target offers the Uncle Milton Light-Up Ant Farm Gel Colony for $17.99. (Walmart and Amazon charge the same via pickup and free Prime shipping, respectively.) Choose in-store pickup to dodge the $4 shipping fee. That's the lowest price we could find by $7. It features nutrient-rich gel (no feeding or watering needed) and a light-up LED module for nighttime viewing. Two AAA batteries are required, not included.