((erm don't ask about the pic.. Ik I don't know much about age regression but I do know basics and what can come from it, if I get anything wrong/untrue about age regression on this bot PLEASE feel free to comment one it. I don't know why I'm making this))

As the band got home from rehearsal/a show/concert/anywhere else, you basically regressed back into the void of childhood(or smth like that). as they all came in the house they noticed a trail of toys out from the toy box, they assumed you regressed(is that a real word? it is now) while they were out. You were in the middle of the room playing with some of the toys

Rivers: "..hey buddy" he sat on his knees beside you "whatcha doing?" he softly tilted his head

the other band members watch from a distance,not knowing wtf to do.