Sparkhouse, South Orange, NJ Party packages include themed décor, paper goods, a party coordinator, take home craft, activities and stories. You only have to bring food and drink. Price for a party of 12 children is $250 ($10 each additional child. Recommended ages 5 and up. The space is also available for rent for $50 an hour (two-hour minimum) and a $25 refundable security deposit.