Jessica Simpson's kids are back in school! The 41-year-old singer took to Instagram on Wednesday to celebrate her two oldest children's return to school after more than a year of remote learning due to COVID-19.In the sweet shot, Ace, 8, and his older sister, 9-year-old Maxwell, beam in their school uniforms as they smile and wrap their arms around each other. «After a year and a half these HAPPY kiddos are BACK TO SCHOOL!!!!!» Simpson wrote, before revealing that the kids will be attending a