For kids of all ages, one big thing helps soften the blow of summer turning into fall: fresh and fun back-to-school gear.

Supplies with popular licensed characters from movies, TV shows and books always make a splash among younger kids, while older students contemplate design and functionality for everything from lockers to dorm rooms to smartphone cases.

For phone-toting high school and college students with an eye for smart design, NewerTech NuGuard KX cases for the iPhone promise protection and a much better fit in the palm of a kid’s hand than other heavy-duty cases on the market.

The NuGuard KX cases for the iPhone 6 and 6 Plus use state-of-the-art “x-orbing gel technology to absorb and evenly distribute kinetic energy.” This means the case provides the massive impact protection that kids need but is a fraction of the size of those other protective cases that fit like a brick in a hip pocket and cramp the hand of talkers and texters with a lot to say. The KX case, measuring a thin 1/2 inch thick when on the phone, slides into a pocket or even stows neatly in a day-planner.

Plus, the one-piece design — a hard shell with a soft interior available in red, black, blue and midnight — means fast installation, easy access to ports and buttons, simple cleaning and less to lose.

The additional “impact x-orbing” screen armor keeps the glass screen on the iPhone looking new, preventing damage from impacts and scratches but not interfering with the Retina display. Other screen covers might slip or turn yellow but the self-adhesive NewerTech cover installs without the use of water to preserve bubble-free clarity and block dirt and dust. The armor even held up to NewerTech’s hammer-hit tough claim.

For those with an eye toward color, a stop at Poppin.com might go a long way in desk supplies, dorm storage and other gear. Among the New York City company’s back-to-school products is an 18-month, spiral-bound planner good from July 2015 to December 2016. It includes weekly and monthly views with color-coded pages by month, along with a handy translucent front pocket.

“We’ve been very pleasantly surprised in past years with how well we’ve done with planners,” said Jeff Miller, Poppin’s vice president of product design. “You hear so much about how everybody’s moved to electronic whatever but we’re very much still in a paper age on planners for students.”

Dorm rooms remain, well, dorm rooms, so space is at a premium. Poppin sells a storage unit called the Box Seat for the college contingent tired of the milk-crate look. It’s covered with fabric in light and dark gray, navy, orange, red and pool blue, and is sturdy enough to withstand 275 pounds.

At Staples, students at two middle schools will see the fruits of their labor hit shelves. They were chosen to work in teams to come up with school supplies of their own for the company’s new Designed by Students Collection.

Among the winning products: The Big Pen, a pencil case that looks like a pen or pencil and actually writes. It comes in versions that are highlighters, ball point pens, markers and mechanical lead pencils. The cases include a pencil sharpener and real erasers at one end. Refills are available for the writing-implement part.

Another of the student designs chosen is an ingenious locker organizer that zigzags vertically to create nifty cubicles. The Floating Shelf comes in color combinations worthy of boys and girls — neon green and gray, purple and pink, and black and dark blue.

Alison Corcoran, senior vice president of marketing for Staples, said the company worked closely with about 48 students in all, from Middle School 88 in Brooklyn and the Ron Clark Academy in Atlanta. About 14 products are included in the collection.

“They made presentations. The teams did self-criticisms and evolved their ideas as part of the curriculum,” she said. “School supplies have been around forever. We thought, let’s take a fresh look with the people who are actually using these things on a day-to-day basis and ask, `How can we make them better and more relevant?”’

Yet another of the student designs is the Back2Back School Bag, a rectangular-shaped backpack that provides wider storage space and has two oversize slots for laptops and folders. It also includes a separate, attached compartment at the bottom to segregate lunch or snack items — or smelly gym shoes — from the main compartment.

“Kids loved it. It’s a highly functional shape,” Corcoran said of the unusual design.

This year, the rambunctious little yellow Minions with the big goggles have their own feature-length film spinoff from the “Despicable Me” franchise, and have surfaced on backpacks and notebooks available at Target.

A new take on Charlie Brown in another theatrical release, “The Peanuts Movie” due out in November, might have something to do with two choices in Snoopy-theme soft lunch bags, including one with the famous beagle snoozing on top of his equally famous doghouse.

Givebacks have grown among companies doing business in back-to-school. Many offer buy-one-give-one programs to kids and classrooms in need, or they’ll fill donated backpacks with school supplies to donate.

At Yoobi, a spate of new supplies in that vein was curated by Usher. The Yoobi X Usher collection was designed by artist Jonni Cheatwood and features five prints for more than 20 products, ranging from blue paint drips to pink-and-green splatters in binders, notebooks, pencils, pencil cases, folders and journals. For every item purchased, Yoobi donates an item to a worthy classroom. The collection is available at Yoobi.com and in Target stores nationwide.

It’s not the first education-focused collaboration for Usher, who has two school-age sons. They, too, had a hand in the project, the singer said by email.

“I looked at what colors they were drawn to and in a very sly way, I’d show something to them and ask, ‘What do you think about this? Do you like this color?’ That helped me curate the collection,” he said.