Spray inside of 4-quart slow cooker with no stick cooking spray. Add carrots and melted butter; toss to coat. Cover.
Cook on HIGH 3 to 4 hours or until tender.
Meanwhile, mix brown sugar, cinnamon, ginger and salt in small bowl until well blended. Toss cooked carrots with brown sugar mixture in slow cooker just before serving.
Keep cooked carrots in slow cooker when transporting to a party. Bring the brown sugar mixture in small resealable plastic bag. For best results, toss carrots with brown sugar mixture just before serving.