Correct. I first tried selecting "Don't Know", then I entered one child's name and it didn't add any wristbands to the cart. I then tried to add an email, and it sent a confirmation request but I was busy at the time and had to drop it then. I'm not filled with confidence that even if I confirm an email it will let me add a wristband to the cart. Am using Firefox, will consider trying on different browsers.
Aha! Adding an email for the child in addition to saying I don't know the email allowed it to select the name, even though i haven't confirmed it yet. But on Firefox it still doesn't let me add the wristband to cart. It did work on Chrome.
What a mess. Now to get the next kiddo added on.
For the second kid I tried finding by name without entering any email, and it worked on Chrome. Firefox won't add them though. So I probably didn't have to do the email at all when adding kids, it was just that Firefox doesn't add wristbands to the cart (but did add a day-badge). I recommend trying Chrome or another browser.