Dreaming about happy memories from childhood, especially at a place like your grandma's lake house, often signifies a longing for simpler times and feelings of joy. The sunny day and the fun you experienced with your cousins suggest a sense of freedom, happiness, and connection with family.

This dream may reflect your current state of mind or your desire to recapture that blissful innocence and carefree spirit. It could also indicate a need to reconnect with those positive emotions or to seek out experiences that bring you joy and relaxation in your current life.

If you are feeling stressed or burdened at the moment, this dream serves as a reminder to take a break, seek joy in simple pleasures, and value relationships that bring you happiness. Consider what aspects of that time in your life you can incorporate into your present—perhaps spending quality time with loved ones or engaging in activities that make you feel carefree.