void _activateListener() {
  _dailySpecialStream =
      _database.child('dailySpecial').onValue.listen((event) {
    final data = new Map<String, dynamic>.from(event.snapshot.value);
    final dailySpecial = DailySpecial.fromRTDB(data);

    setState(() {
      _displayText = dailySpecial.fancyDescription();
    });
  });
}