That stinks. There was a similar gift-giving plan, for the 8 nights of Hanukkah, at our kids' former private school. Here I was, mom of 6, buying 8 nights of gifts for all 6 kids' gift recipients, but my kids got very little in return because so-and-so forgot, or whatever excuse of the day was. Yeah, I get the idea that it's about the giving and not the receiving, but holy heck, if you commit then do it and don't leave other kids without.
Similar happened this year with one son. He and another Jewish friend committed to getting a small candy treat for one another. Son pesters me to remember to get a particular candy friend likes, I do it, son gives it, son gets nothing in return because, as his friend says, "My mom doesn't want to buy it." Ugh, all of about $2-3 dollars worth of a candy treat.
Bah Humbug.