My son had put sticky notes on either side of the mini garden so we would know which seeds were planted where (parsley on one side, basil on the other), but I didn't think to tape it down, which meant they fell off. This isn't disastrous as it has allowed him to write in his prediction that the side with 3 (4 now; can't see the 4th) is basil since the package said they would germinate sooner than the parsley. There is one little parsley sprout on the right-hand side.
I don't know yet if we can just leave the herbs in the peat pellets, if we'll need to fill it with dirt at some point or what, but we're not there yet, so it's all good. ;)