How did you manage jealousy or rivalry between older siblings and the new baby?

Hey mamas, let's talk about the green-eyed monster! Jealousy or rivalry between older siblings and the new baby is common. How did you address these feelings and create a loving and harmonious environment for all your children? Any strategies, books, or activities that helped diffuse jealousy and build strong sibling relationships? Share your experiences and let's support each other!