Hello Harvey,
Thanks for stopping by planDisney with your question. Before you know it you'll be right in the middle of
The World's Most Magical Celebration!
Adding the
Park Hopper Option to your tickets gives you so much flexibility when it comes to visiting the parks. As long as you start your day at the
park where you have a reservation, in this case Magic Kingdom, you are able to go to any other park or parks after 2:00 PM without any further reservations. In fact, I have seen people hop to all 4 parks in a single day; although that's really ambitious and uses up a lot of your day traveling from park to park.
You can absolutely start your day in
Magic Kingdom, hop over to
Disney's Hollywood Studios in the afternoon, and then head back to Magic Kingdom to experience
Disney Enchantment. However, keep in mind that there are several popular attractions that you may want to experience in Disney's Hollywood Studios, and the wait times can get quite long, so you may find that you want to stay more than a few hours in that park. The great thing is that since you don't have to make reservations for the parks you want to hop to, you can determine those plans at the last minute.
Hope this helps. Have a magical vacation!
Diane