The first is with a line which Sheldon (Iain Armitage) says in both episodes ... which sees him don a full body wetsuit, hardy rain boots, and a snorkel for the ceremony, the young scientist ...

While Jim Parsons looks more or less similar, it's the little Iain Armitage who looks all grown ... the show was simply a ritual to get young Sheldon’s body ready for the transference of youth.” ...