They’ve celebrated this Halloween tradition for more than 35 years.

Students wear their sweetest, scariest costumes for a parade that stretches through Potter School, inside and out.

As music plays in the background, students, many of them with arms outstretched in greeting, showed off their costumes to both classmates and families in attendance.

Some classrooms have themes, with the first graders celebrating Hocus Pocus, while the second grade related to McCormick spices.

“This one of our biggest parental events of the year,’’ Principal Richard Porter said. 

So much so that, appropriately enough for Halloween, parking spaces seemed to disappear. 

“Each year it gets bigger and bigger,’’ he said.

As at Quinn Elementary a few miles south, blow-up costumes were a big hit.

The oversized outfits definitely drew attention. 

But for a few students, this created a technological glitch, one that required a call home.

“They needed their battery packs,’’ Porter said with a laugh.