Break out the birthday cake and environmentally friendly confetti.

On this day 100 years ago, President Woodrow Wilson signed the act creating the National Park Service — helping to protect such American treasures as the Grand Canyon in Arizona, Yosemite Valley in California and the Great Smoky Mountains in North Carolina and Tennessee.

There are 59 national parks across the country, and many more battlefields, historical sites, memorials and monuments that the National Park Service oversees. Readers traveled to many of these places for the Summer of KidsPost, taking in the towering sandstone walls of Arches National Park and the mountain beauty of Glacier National Park.

Summer is almost over, but if you’re planning a trip to the park — whether it’s to the park on the corner or to Denali in Alaska — KidsPost wants to go, too. It’s easy to be a part of the Summer of KidsPost, and you might win a prize pack next month.

All you have to do is:

●Go on a trip: Anywhere you go, we want to go, too.

● Take along a recent copy of Kids­Post from any day of the week.

●Get someone to take a picture of you (and siblings or other family members) holding Kids­Post. At least one person in the photo must be between the ages of 5 and 13.

●Have a parent or guardian fill out the form (click here for the form) and attach your photo. Or mail it to Kids­Post, The Washington Post, 1301 K St. NW, Washington, D.C. 20071. One submission per family, and photos must have been taken after May 26, 2016. Entries are due by August 30.

●Your parent should include the full name, age and home town of everyone in the photo. We also need your parent’s phone number and email address. Include a sentence or two about what made your trip memorable.

●We will publish pictures in the newspaper and at kidspost.­com in the coming weeks. At the end of the summer, three randomly selected families that have sent in photos will receive a prize package of books and KidsPost goodies.