33 - Center

34 - Raisedbutton

35 - ElevatedButton icon - ElevatedButton - TextButton

36 - InkWell And IconButton

37 - FloatingActionButton

38 - GestureDetector

39 - statefulwidget vs statelesswidget

41 - checkbox

42 - checkboxListTile

43 - radio

44 - RadioListTile

45 - switch

46 - switchListTile

47 - ListTile

48 - CircleAvatar

50 - AlertDialog

51 - AlertDialog Part Two

52 - Listview

53 - Listview part 2

54 - Listview Builder

55 - Listview separator