This educational website does a great job with it's analog and digital clock. You can change the clock to real time. You can roll a dice to get a random time on the clock. You can actually change the mode and use the clock's hands to demonstrate angles and fractions. The clock's style and color can also be changed. You can also change the style of the tick marks that go around the clock which makes it easier for students to view, when you are demonstrating different times.
You can use your smartboard to easily move the big and small hands to make whatever time you want. As a 3rd grade teacher I use this every time I discuss time with my students.
