This is Charlie and Jim in the entranceway to Charlie's school on Wednesday morning (yes, he's still wanted a ride most days to school; he is taking the bus home).
Charlie is wearing his swimsuit; he insisted on wearing it around midnight on Tuesday (he'd slept from 6.30 till then). He gets to swim in three-week segments a couple times of year. Yesterday wasn't a swim day but he clearly has internalized that swimming, and wearing his swimsuit to school, is a Wednesday thing. And his school is well-heated (or cooled, depending on the season), so he's comfy in shorts or longs.