Duck and Green have an interest in rocks, so what if Pink has an interest in fossils? Imagine a scene where the kids are playing outside for a while, and Pink picks up a fist sized rock. She excitedly shows the others her rock and Green notes that it's limestone and that, other than that weird shape that's poking out a bit, it's not very impressive. That is, it wasn't very impressive until Pink takes a hammer to it and reveals the beautifully preserved ammonite fossil inside.
Pink would totally be into fossils along side Green, honestly I think all the kids would like fossils but Yellow would feel bad that the animal died to make them so he'd be like this 🥺🥺🥺
So yeah, Pink finding a cool rock, Green identifying said cool rock is probably a fossil and launching into the most scientific way to excavate it and then being interrupted by Pink just smashing the shit out of it with her hammer (Yellow screams SO loud) and then all the kids crowding around the rock when this is revealed is SO cute
