Dreaming about being with your old boss, especially in a positive context where both of you are laughing and smiling, can indicate a few things.

1. Nostalgia and Reflection: This dream may reflect feelings of nostalgia for your past work environment, particularly the positive experiences you had with your boss and colleagues. It suggests that you might be reminiscing about a time when you felt fulfilled and happy in your role.
2. Connection and Support: The laughter and smiles indicate a sense of connection and support. Your old boss might symbolize guidance or mentorship in your life. This dream could suggest that you are seeking or reflecting on the support you had in that past relationship, perhaps in your current endeavors.
3. Creative Environment: Working with children in an unfamiliar place could represent a desire for creativity and playfulness in your life. It might suggest that you are looking for new ways to express yourself or to engage with your passions.
4. Change and Growth: The fact that the setting is unfamiliar might indicate that you are in a phase of transition or growth. It could signify that you are ready to explore new opportunities while still cherishing the lessons learned from your past experiences.

Overall, this dream could be encouraging you to embrace the positive aspects of your past while being open to new experiences and growth in your current life. Consider reflecting on what elements of that time you miss and how you can incorporate them into your present.