You have to tell EVERYONE, I had this issue with coordinating Stuff for baby #2 and it still didn't quite work. And money is a good substitute for toys.

We're finding with #3 that we only get money not toys, the other two kids got flooded with toys but #3 has so far been given a handful of trucks and cars and that's about it. And his big sister has swiped all of those. The poor kid is going to grow up with a complex.