I don't remember if the Clamfolk would make any sort of other appearances down the road, but I do like them
When you have situations where they will not be getting the chance to usefully replay the card in question Boomerang is comically better than Vindicate, one less mana, one less colour, instant speed and not even triggering any "when this dies" effects
We've seen people tape raw cards directly to a piece of paper and drop them in a plain envelope
It also allowed you to play a bunch of great silver bullets in your maindeck for just the right times, making it very difficult to play against
Starting with the trainer whose birthday it is, open a booster pack and fan out the cards for them to pick one with their eyes closed, saying "I choose you!" Then looking at the card, they must convey what Pokemon they've chosen to the other children without saying a word