Happy Halloween? Not if allergies get in way .

Other allergy threats on Halloween include dust mites in costumes that have been spent time in storage, nickel in tiaras, wands, and other costume accessories, and "cheap Halloween makeup."

Some kids are allergic to latex, which is found in some balloons and rubber toys - another thing parents may want to consider.

"When people think of Halloween-associated allergies, they focus on candy and often overlook many other potential triggers," Dr. Myron Zitt, past president of the College, said in a written statement published on the organization's website.

Happy Halloween! Do giant pumpkins have a size limit?

It all began with Nova Scotia grower Howard Dill, the most famous person in the world (at least when it comes to mammoth pumpkins). All of today's record-shattering fruits come from a single gourd from 1979 named the Atlantic Giant, a member of the subspecies Cucurbita maxima. C. maxima was first cultivated in the early 19th century, by growers who crossed a Japanese kabocha squash with a Hubbard squash.

In addition to the right seeds, there are a few other factors that go into colossal pumpkins. According to the National Gardening Association, the elephantine pumpkins prefer a soil pH of 6.5 to 7, with lots of organic matter. Giant pumpkins take 130 days to mature, and at their fastest rate they can gain up to 50 pounds a day, a rate comparable to that of the largest trees.