It’s a sunny summer day and Mae Koslow-Vogel is having a blast with her family as she blows bubbles, dances and belts out “Call Me Maybe” and some of her other favorite songs. Although it might seem like an ordinary afternoon for a vibrant toddler, such activities were out of reach not long ago. Even spending a few hours outside with her mothers, Courtney and Maura, and big sister, Rosie, was something the 2-year-old could only dream about. …