Regular HoursStart your 4 hour birthday party in the Backyard Adventures for 40 minutes, spend 2 hours and 20 minutes in the gym or in the Backyard, and the last 40 minutes in your private party room in the Backyard Adventures. Cost for a 4 hour party is $395.00 (up to 25 kids) and each additional child is $15.00 each. Available times for the 4 hour parties are: Saturdays from 2:40 - 6:40 pm and Sundays from 4:20 - 8:20 pm. Please call GAR at 815-654-3867 to reserve your party. Parents Night Out Birthday Parties (Saturdays only) 6pm-7:45pm 8pm-9:45pm