Images of two men taking presents from under a Christmas tree have been released by detectives.
Gifts including jewellery, photographic equipment, a tablet and a laptop were stolen just days before Christmas, Scotland Yard said.
The suspects are believed to have climbed over the rear garden fence before breaking into the back of the house in Ashbourne Road in Mitcham, south London.
Once inside, they walked around, leaving dirty footprints as they made their untidy search.
Police said the suspects wrecked cuddly toys, puzzles and games belonging to the victims' baby as they searched the home.
Officers were called at around 3.15pm on Monday December 14 to a report of a burglary in Mitcham.
It was said to have taken place at some point between 9am on Saturday December 12 and approximately 3pm on Monday December 14.
CCTV footage filmed at 9.59pm on Saturday December 12 within the home shows the two men taking the presents from under the Christmas tree.
They returned at 5.43am on Sunday December 13, police said.
The first man is described as in his 20s and of medium build, with thick eyebrows. He was wearing a zip top with three stripes on the shoulders, with the hood up, jeans, trainers and gloves.
The second man is also in his 20s, black and of slim build with a dark beard. He was wearing a dark-coloured zip-up jacket over a light-coloured hooded top, loose fitting trousers, dark trainers with a reflective strip on the heel, and gloves.
Anyone with any information is asked to contact police on 101 or Crimestoppers anonymously on 0800 555 111.