@twinmom34 keep asking questions. The people on this group are great with suggestions about trip planning (
@englanddg is very good).
Before my niece an nephews went on their first trip, I gave them Disney gift cards to use for fun spending in the parks. Even though you've already planned a fabulous trip, this might be a good option for your twins. My niece was told by her mom that if she wanted anything outside of meals and planned events, she had to spend her own money. The gift card (they can now be loaded on to the bands) let her have some independence when buying souvenirs. She could make her own decisions and didn't have to ask mom for money.
Can you be my mom, too? Great plans.