The zoo in Thompson Park is opening its summer season Saturday with a birthday celebration. The first 200 guests will get a cupcake and the celebration also will include serving birthday cake. The celebration will be the zooâs way to kick off its 100th year in the north country and 30th year as a Conservancy. Joshua Baughn, director of marketing and development, said the zoo has a lot to celebrate after a year of the pandemic. âWeâre excited to get back and see people visit their animal friends at the zoo,â he said. The zoo will host a series of events and activities celebrating the 100th anniversary throughout the summer season, culminating with a black tie event on Aug. 28.