CHICAGO (CBS) — If the clerk at McDonald’s on Thursday asks, “Do you want fries with that?’, you’d best say yes.

Because they will be free.

A total of 23 McDonald’s restaurant will offer guests a free small French fry from 11 a.m. to noon.

Why?

Because McDonald’s is celebrating the “re-imaging” of four restaurants downtown.

As a bonus, those four locations will also give away free Big Macs to the first 100 customers, starting at noon.

Those for locations are:

• 10 E. Chicago (Chicago & State)
• 500 W. Madison (City Corp Plaza/Northwestern Atrium)
• 186 W. Adams (Adams & Wells)
• 144 S. Wabash (Wabash & Adams)

A complete list of the 23 downtown restaurants participating in the free small fry offer:

233 N. Michigan (Illinois Center)
29 N. Wacker (Wacker & Washington)
111 W. Jackson (Jackson & LaSalle)
23 S. Clark (Chase/Clark & Monroe)
233 W. Jackson (Jackson & Franklin)
500 W. Madison St. (City Corp/Northwestern Atrium)
36 W. Randolph (Randolph & Dearborn)
230 S. State St. (State & Quincy)
10 E. Chicago Ave. (Chicago & State)
144 S. Wabash Ave. (Wabash & Adams)
405 N. Wabash River Plz (Wabash & Rush)
119 North Wabash (Millennium Park)
645 N. McClurg Ct. (McClurg & Erie)
1380 W. Lake (Lake & Ogden)
201 N. Clark (Clark & Lake)
600 E. Grand Ave. (Navy Pier)
300 N. Wells (Merchandise Mart Plz)
2301 S. Lake Shore Drive (McCormick Place N. Bld. W Dock)
186 W. Adams (Adams & Wells)
Field Museum (Roosevelt & Lake Shore Drive)
555 W. Madison (Presidential Towers)
600 N. Clark (50th Anniversary/Rock-n-Roll)
225 S. Canal St. (Union Station)

Some of the changes downtown McDonald’s customers will notice includes exteriors that complement the urban landscape and interiors with new lighting, along with new furniture with natural finishes. Technological enhancements include flat-screen TVs, digital menu boards and more convenient order taking process.