A nine-year-old boy had his watch stolen by a group of five men as he played on a swing in Walnut Tree.
The men grabbed the boy by the wrist and twisted his arm in the incident which took place in Studley Knapp on Monday at 6.10pm.
After taking the watch the group left but returned within seconds to steal his baseball cap before running off towards Wavendon Gate
The man who took the watch is white, about 18-years-old, 5ft 10ins, medium build, with blond spiked hair and clean shaven. He was wearing sunglasses, a white T-shirt and black trousers with the multi-colour Nike logo.
The second man, who took the hat, is black wearing yellow or orange astroturf shoes.
The rest of the men were black and wore black and blue striped tops.
The watch had a silver face with white numbers and the cap had three green stripes.
Any witnesses can call police on 101 or Crimestoppers, anonymously, on 0800 555 111.