Swansea emphatically booked their place in the third round of the EFL Cup as the club's youngsters romped past Peterborough.
Jay Fulton netted his first goal for the Swans in the 15th minute, heading home from close range to put the Premier League side in control at the ABAX Stadium.
Oli McBurnie, making his competitive debut for the visitors, added a second with four minutes left of the first half before the break before settling the tie as a contest with Swansea's third two minutes later.
Mark Tyler could only parry Mike van der Hoorn's low shot and McBurnie was on hand to round the goalkeeper and fire home.