Tip I've never heard before!
I was reading an article with tips on WDW trips, not expecting to learn anything new, but this one surprised me.
Quote:
If your child’s too short to ride something—height requirements are on the guide map, and there are rulers before every queue entrance—ask the nearest cast member to give you a voucher that enables them to cut the line when they grow tall enough. For Splash Mountain, they’re dubbed a “Future Splash Mountaineer,” and on Space Mountain, they’re handed a “Mousetronaut Certificate.” Many other major rides have their own versions.