Jennea Ahmadu, 8, of Arvada reacts while inside the Haunted House with her mother Sherrie Hernandez. The Denver Police department sponsered a free, safe and fun Halloween for all children under 12 at their downtown headquarters at 1566 Washington Street. [Getty Images]

Jennea Ahmadu, 8, of Arvada reacts while inside the Haunted House with her mother Sherrie Hernandez. The Denver Police department sponsered a free, safe and fun Halloween for all children under 12 at their downtown headquarters at 1566 Washington Street. Haunted Houses, face painting, trick or treating, police on horses, motorcycles, & bicycles were all a part of the festivities for the kids. Helen H. Richardson/ The Denver Post (Photo By Helen H. Richardson/The Denver Post via Getty Images)