Hi Gloribel,
How exciting for you to be visiting Walt Disney World in just a short time! It is wonderful to hear that you will be visiting with your sister and her children, and I am sure the memories you are about to make will be some that you will cherish forever.
Mickey's Not-So-Scary Halloween Party is quite a popular event and it often sells out of tickets each year. There is a small possibility that more tickets may become available, so I advise you to check the
Mickey's Not-So-Scary Halloween Party ticket page each morning just in case something becomes available before your visit. Another opportunity for obtaining a party ticket is to check at the ticket window at
Magic Kingdom Park on the morning of the party to see if any more tickets are available. If you are a Disney Resort hotel Guest, you can also stop by
Front Desk Services after you arrive to see if they have any luck in obtaining a party ticket for you as well.
I hope you are able to find another party ticket, but I have a suggestion for you to help your sister if you cannot purchase a party ticket. Mickey's Not-So-Scary Halloween Party goers can enter Magic Kingdom Park as early as 4:00 PM with their party ticket. If you are able to go to Magic Kingdom Park with your sister at 4:00 PM using your regular theme park ticket or Annual Pass, then you could assist her with the children for a couple of hours before the party starts.
Since you mentioned that your travel party will have little ones, I want to leave you with this guide for
Planning for Preschool Kids & Little Ones to help you plan your visit. This guide touches on many services and activities available to you including services like
Rider Switch and facilities such as
Baby Care Centers.
Have a Magical vacation and please visit us here at
planDisney with all of your future Disney vacation planning questions!
See Ya Real Soon,
Brenda