Of all the adorable Wonder Women trick-or-treating on Halloween, it would be hard to imagine one who deserved the title as much as tiny Seger Wilson.

Snoozing on her pillow, with an arm stretched out as if she’s about to take flight, Seger wore her red cape and starred headband like a true superhero.

And, like her twin sister, Reese, she has shown heroic strength. Both have grown leaps and bounds since they arrived three months ago in the NICU in the Gerber Foundation Neonatal Center at Helen DeVos Children’s Hospital.

The preemie babies weighed 1.5 pounds at birth. Now, Seger has passed 5 pounds and Reese weighs 6.5 pounds.

Their mom, Meghan Wilson, had fun choosing costumes for the twins.

Wonder Woman fit Seger, because “She’s come through quite a few surgeries,” Meghan said.

For Reese, she chose a blue crocheted puppy costume, which holds special significance for Meghan and her husband, Adam. They have two dogs, a yellow lab named Carver and a lab-basset hound mix named Ziggy.

“They are ready for their sisters to come home,” Meghan said.

In a room nearby, Mackenzie and Jacob Gray tended the cutest little strawberry patch—their three baby girls, dressed in pink buntings adorned with tiny black seeds and each topped with a green flower.

Hazel, Evelyn and Paisley, 3-week-old triplets, slept soundly beside each other, propped in an armchair for photos.

Mackenzie ordered the costumes online a couple of days ago and delighted in their timely arrival. A fan of Halloween, she looks forward to more costume parties in their future.

“I can’t wait until next year,” she said. “We’re going to do a theme.”

On the first floor of Spectrum Health Helen DeVos Children’s Hospital, the annual Halloween party drew a host of characters—superheroes, princesses, fairies and colorful creatures. Young patients and their families picked out costumes, played games, created crafts, ate pizza.

Farah Berent marveled at the festivities, as she helped her 2-year-old son, Zayn, eat a slice of pizza.

She has heard about the parties and events at the children’s hospital, “But you never think you’re going to be here on Halloween,” she said.

Two days earlier, Zayn came to the hospital by ambulance. A respiratory infection had turned into pneumonia.

By Thursday’s party, he felt better—well enough to put on his Paw Patrol costume and join the party.

“This is amazing,” Farah said about the Halloween activities. “Kids are happy. It’s helping them heal.”