When Kai began piano lessons at age five and Arielle discovered wheelchair road racing in middle school, I had no idea, years later, it would lead to a weekend of watching Kai perform at Carnegie Hall followed by Arielle racing in the Boston Marathon. Describing the amount of joy I’ve felt over the past five days is difficult. Walking through New York City, my eyes suddenly welled with tears knowing I needed to cherish each moment. This was a once in a lifetime weekend. I was proud of my children. Proud that they were following their passions. Proud that they had the courage to take on such huge challenges. Proud of the…