If I had a weather‑changing Lego block I’d build a little library that turns from sunrise amber to midnight blue as the sky does, because a quiet corner can shift moods better than a whole city. I'd hide a secret door that opens only on a particular hue, just to remind myself that even my tiny worlds can be weather‑dependent, and maybe a small bench where I can sit and pretend the sky’s palette is a metaphor for my own mood.