Dreams involving an ex-partner and a child can carry significant emotional weight and meaning. Here are a few interpretations to consider:

1. Unresolved Feelings: Dreaming of an ex may indicate that you have unresolved feelings or lingering thoughts about the relationship. The presence of a child could symbolize a desire for growth or a new beginning, perhaps relating to personal development or a wish to start a family.
2. Nostalgia and Reflection: Such dreams can also reflect nostalgia for the past. The child in the dream could represent innocence or a time in your life when things felt simpler. This may be a sign for you to reflect on what you've learned from that relationship and how it has shaped you.
3. New Responsibilities: If you are currently in a different relationship or situation, the child may symbolize new responsibilities or commitments that you are facing. The dream could be prompting you to consider how your past influences your present and future.
4. Desire for Connection: The dream might indicate a longing for connection, whether it's with your ex, the idea of family, or the qualities that child represents—such as joy, playfulness, or creativity.

Consider how the emotions in the dream made you feel, as they can provide further insight into its meaning. Reflecting on your current life situation and feelings about your past relationship can also help clarify the dream's significance.