there usually arent any lines, and the kids can stay in the area for as long as they want. But the Honey I shrunk the kids playground is MASSIVE! just a little bit impossible to keep an eye on your children!
but theres cms all around so you dont really have to worry about something happening to them.
also dont be surprised if youre watching your kid go up a slide and never come down the way you expected. there are multiple exits for the slide, and it can get confusing at times. If you can, go with your children and stick together.
Have fun!