I don't think I've met a kid yet that doesn't love the marshmallows in Lucky Charms Cereal! And if you're lucky enough to find the St. Patrick's Day special edition of the cereal, you are even luckier!
One tip - sprinkle and lightly press the marshmallows on top of the ganache right before you serve. They will stay perfectly "crunchy" for a couple of hours, but after that, they will absorb moisture from the ganache and soften slightly.
Hope that you enjoy this as much as my little ones do!