Never make a promise to a little kid you don’t plan to keep. They remember every single one.

Kids do not have the adult filing system for maybe. What you said becomes a fixed event in their week, and they will count down to it. When it does not arrive, the lesson is not about your schedule, it is about whether words from people they love are reliable. That one generalizes far beyond you.

Say what you can actually do, even if it is smaller, and then do exactly that. If something falls through, tell them yourself and give them a real replacement date.