These tots are taking the plunge.
This stunning pic is among others captured by Seth Casteel, which will be featured in a new tome.
Casteel, who had a best seller with pictures of swimming dogs, reveals his new book aims to promote water safety.
He worked with US swim schools, taking 100,000 shots which were whittled down to 67.
“My eyes light up when I see these babies,” he said.
“It’s all new to them so you can capture their curiosity. I made a joyful book to hopefully encourage parents to book lessons.”