Police Community Support Officers are to approach people in Warner’s Park, St Ives, who may have witnessed a collision involving a four-year-old boy and a mobility scooter.
Max Hayward was left with a broken leg after the crash at about 4pm on Friday, September 19.
The youngster had run ahead of his mother, Gina, who did not see what happened and the scooter rider, a woman, did not stop.
Police have appealed for witnesses to come forward so they can find out what happened.
A spokesman said PCSOs will be in the park at a similar time of day to when the crash took place to ask people if they saw anything.
INFORMATION: Anyone who can help police with their inquiries should call Det Con Dianne Booth on 101 or Crimestoppers, anonymously on 0800 555111.