Who suggested the firefly picnic ?

I’ve been wondering, in all the other adventures in this new episode, it was at some point revealed who suggested them, but the firefly picnic no one said anything and I’m still thinking of who it could’ve been LOL. Who do you guys think suggested this one?

PS: this is my favorite part of the episode for SURE. There’s nothing in the world I love more than fireflies in the summer night lol