It would probably be impossible to pinpoint what it is about big trucks that fascinates small children. Whether it’s the sirens, shiny paint or sheer size — children love them.

On Saturday, kids of all ages will have a chance to have a close encounter with the objects of their fascinations during the 13th annual Touch-A-Truck event organized by the City of Gainesville.

The free event will be held from 10 a.m. to 1 p.m. Saturday at City Park, 898 Longstreet Circle in Gainesville.

Touch-A-Truck has been a popular event for families since it started. About 1,500 people turned out for last year’s event.

It is also a great teaching opportunity for parents who want their kids to learn about the roles transportation plays in our daily lives.

According to event coordinator Brent Sexton, attendees are in for a treat because there will be nearly two dozens trucks and other super-sized vehicles and machines just waiting to be caressed by little digits.

Among other things, participants can expect to see: a 24-foot Mack truck, a police patrol car, a fire truck and a tractor.

Although participants will be able to touch and tour the wheeled exhibits, jumping is discouraged — Unless it’s inside the monster truck bounce house that will be set up throughout the event.

Snow cones and other refreshments will be available for purchase.