The first lady showed her spirit by sporting feline ears, a tail and a black nose. She said she dressed as her cat, Willow. Jean-Pierre donned a halo and angel wings, saying she chose that over a devil costume. After she finished reading, the president and first lady spent about 90 minutes welcoming children from local public schools and from military families, who were invited. As the costume-clad kids walked up along the driveway, Biden dropped M&M’s or Hershey’s Kisses in little boxes stamped with the presidential seal into their bags or buckets. The first lady handed out books.