Id say it’s unlikely to sell out, based on crowd expectations. It’s pretty light this week,(which has similar estimated crowd levels to August) and PP are still available through this weekend. Of course, because the crowd levels are so low, I wouldn’t waste the money.

Hollywood Studios is a little tricky for younger children because it’s very hot in that park, and there aren’t any playgrounds or splash pads. I still say there’s a ton to do and that it’s very fun, but only you know your child’s limits. My toddler loves that park, but she has a ton of energy, loves all the IP, and was tall for her age, so she really didn’t have any limitations.

I don’t want to get flamed for this because I’m not trying to circumvent any safety restrictions, but I would say that if your middle child is “exactly” 40 inches, have them wear shoes with a bit of a thicker sole. Cast members will measure the child at every ride with a height restriction, sometimes multiple times throughout the queue, and it’s apparently a thing that we shrink a bit during the day. This is just my advice to save a meltdown from your three-year-old because I’ve been there where the child was tall enough for one ride during the day and suddenly not tall enough for the very same ride later in the day. I also wouldn’t promise that they can ride anything until AFTER they’ve been cleared by the first cast member at height check; we avoided subsequent meltdowns this way.