What did I just do?

Bluey and Mackenzie were just walking in the park on a relaxing afternoon, but when a massive portal opens up the two are sucked into an Unfamiliar world. Will the two be able to come back home or will they be stuck in the very different universe!?
BTW: this is part of my other two books (Bluey and Mackenzie the kidnappings and the Australian civil war of 2018). The characters are 12-13 years old and this takes place right after Bluey and Mackenzie the kidnappings. Hope you enjoy!