We’ve been scouring toy stores, game outlets, booksellers, and the internet for unique gifts designed to provide kids with some old-fashioned (i.e., screen-free) fun while challenging developing minds. Here are 14 of the most Earth-conscious—and awesome—gifts we could find for green-minded kids of all ages.

Is there anything more fun for a kid than a slingshot? Treat budding Bart Simpsons to a rewilding adventure via the gift of a Seed Slinger Wilderness Restoration Kit ($25) from Modern Sprout. The kit comes with seven seed balls containing a blend of wildflowers, grasses, and ground cover seeds, ripe to be slung into developed spaces void of plants (like onto medians and under power lines). The best part is, after those bombs morph into local wildlife habitat, kids ages 8+ can make their own seed bombs and continue slinging away. (The kit includes at-home seed bomb instructions and a Wilderness Warrior Merit Badge to recognize kids’ work to better the planet.) What’s more, a percent of every sale goes toward supporting the conservation organization American Forests.

The brainchild of parents who traveled to every single US park and their board-game-designer son, Underdog Games’s Trekking the National Parks Trivia ($30) is the perfect recipe for family game night. Containing 600 questions, it’s bound to both educate and spark plenty of curiosity about America’s Best Idea.

There are game families, and there are puzzle families. If yours prefers to jigsaw the night away, check out the& National Trails Puzzle ($35) from L.L. Bean. Featuring the 11 national scenic trails (including the "triple crown" as well as lesser-known paths like the Arizona and New England Trails) in the form of 500 pieces, it makes for an indoor adventure sure to inspire hiking adventures.

Engage young ones in wildlife education with what is surely a favorite topic: bowel movements. Uncommon Goods’ illustrated Poop Bingo ($20) board tests up to eight kids’ abilities to match beasts with their business. Kids will pick up plenty of strange but true feces factoids (did you know, for instance, that wombats poop in cubes?).

What about a STEM-oriented play set designed to inspire curious kids to take a hike? The Little Medical School Wilderness Survival Set ($33) delivers adorable pragmatism, complete with a cuddly plush Bigfoot, a 5-in-1 survival tool (including a compass, emergency whistle, fire starter, signal mirror, and waterproof matchbox), and an activity book (containing lessons about how to ID poison ivy and how to build an SOS sign out of rocks). The kit challenges kids to earn a diploma by completing tasks designed to teach outdoor survival techniques and basic first aid.

Got stuffed-animal-adoring tots on your list? Check out sweet Kiki and Tembo ($39 each) from the Elephant Project. Not only does the founder give 100 percent of net proceeds to respected agencies that care for orphaned, abused, and injured elephants, but also each gift comes with a little poem, plus info about the plight of elephants. The idea is to benefit the beloved species while teaching children how to act as voices for the voiceless.

Calling animal and art lovers! Artist Katherine Homes’s Threatened Wildlife Species Coloring Book ($16) contains more than 50 hand-traced illustrations, plus interesting facts about each species and how we can take action to protect them. These coloring books (appropriate for children and adults) are made with 100-percent-FSC-certified papers, and 1 percent of profits benefit wildlife advocacy organizations.

When the knife mavens at Norwegian outdoor tool brand Helle focus-grouped a tool for future outdoorspeople, designers realized that none of their own kids wanted “a ‘kids’ knife.’” So, it had to be the real thing. The Spire ($74) boasts all the classic features of a grown-up knife, just in a smaller package. Its 3.46-inch dark-wood handle is shaped to provide a firm grip for smaller hands, and the 2.6-inch blade has a Scandinavian flat ground edge and a blunted tip suitable for beginners. Each knife comes with a natural leather sheath. It’s a tool you and yours will want to pass down to future generations (along with the knowledge, skills, and supervision to use it properly!).

The original wearable sleeping bag was invented high in the mountains of Chile and designed to provide campers and home loungers with maximum mobility, versatility, and coziness. Good news: The lightweight Selk’bag, so named for the Selk’nam people of Tierra del Fuego, Chile, just launched two wearable bags for kids ($79). Each weather-resistant, lightly insulated bag is made from 90 upcycled plastic bottles, plus 100-percent-post-consumer recycled fabrics, insulation, and zippers. Go on—give the gift of a maximally comfy backyard camping trip or sleepover.

Know an older kid who’s got their eye set on an epic camping or backpacking trip after winter thaws? A funny and philosophical new guide from Mountaineers Books, Diana Helmuth’s How to Suffer Outside ($19) uses colorful illustrations, how-to instructions, and self-deprecating narrative to teach hikers and campers of all stripes how to venture outdoors with confidence. Partly a critique of modern hiking culture (this encompasses both seasoned backpackers and urban day trippers who romanticize outdoorsiness), the book teaches adventurers young and old how to hit the trail without breaking the bank and includes plenty of the helpful advice (plus checklists and resources) every novice needs.

Enchanted by the rapid development of her dog’s puppies, Dutch photographer Marlonneke Willemsen spent months taking studio-style images that capture the wonder and fragility of new lives, not only of the puppies but also of young guinea pigs, cats, farm animals, reptiles, and fish. The result is Growing: How Animals Come Into Our World ($30), out earlier this year from teNeues Publishing. The charming photo book is an educational and charming treat for giftees young and old.

For younger readers, we love B Is for Bison ($10 from Gibbs Smith Books), which features fetching mid-century retro-style renderings of 26 US national parks. Author/illustrator Greg Paprocki uses parks’ iconic animals, landmarks, and vistas to school toddlers on the alphabet (think G is for Grand Canyon, L is for Lava, O is for Old Faithful). It’ll be a hit with both tots and their grown-up reading companions.

Got a lover of dolls on your list? Made from recycled materials and shipped in reusable packaging, the B-Kind line features five dolls ($30 each), each of whom promotes positive messages of kindness and a DIY ethos. For instance, Brianna’s mantra is “There is no Planet B” and, because she enjoys upcycling fashion designs, she comes with DIY paint-and-decorate doll clothes. Koral’s mission is to keep plastic waste out of the ocean, and animal activist Daisy comes with two DIY beanbags for doll play. Move over, Barbie and Ken.

Is there a more iconic item to plunk under the tree than a shiny new bicycle? Good news for big kids who’ve been very good this year: State Bicycle Co. recently teamed up with the National Park Foundation to create a limited-edition collection of rides, clothes, and biking accessories inspired by the national parks. There’s a Glacier-themed road bike, a fixed-gear single-speed Redwood ride, and, most tempting of all (in our humble opinions), klunkers—i.e., retro beach cruiser/mountain bike/BMX mash-ups created in homage to Grand Canyon and Yellowstone (pictured, $500). They couldn’t be prettier, but best of all, a portion of proceeds from each sale supports the National Park Foundation’s efforts to preserve and protect these crucial natural spaces.