With openings on all sides, the PlanToys Dollhouse encourages side-by-side play. Gifting idea: Buy the house as a birthday present and invite aunts, uncles, and grandparents to help furnish it.

Available at bedbathandbeyond.com, $220.

Bring it all home with 3-D Chicago Dollhouses from Grow Books Press. The lightweight, recycled-paperboard houses include a two-flat, a single-family home, and a storefront that even an architect would envy.

Available at growbookspress.myshopify.com, $65.

The complexities of raising a modern family terrify us, which is why we marvel at the simplicity of the MD-20 TrueModern Playhouse, an abode that makes modern living look easy.

Available at truemodern.com, $1,350.

The DIY whimsical cardboard creation from Forty-Two Roads comes with a downloadable PDF instruction set, so you can construct a kitchen, washer and dryer, or tollbooth with materials you’ve got around the house.

Available at etsy.com, $12.

Little designers (and bossy types) can decorate their Recycled Cardboard Dollhouses with markers, stickers, and punch-out furniture.

Available at gifthero.com, $30.

Design firm Brinca Dada’s Emerson Dollhouse is the perfect toy: You’ll actually want to live in it — er, look at it — and your kids will want to play with it.

Available at babesta.com, $329.

A bookcase that moonlights as a playhouse, the Krooom Castle is made of recycled cardboard strong enough to hold Dr. Seuss and the Knights of the Round Table.

Available at abesmarket.com, $70.

A modern dwelling made of easy-to-assemble birch plywood slats, the Ray Ray Dollhouse features a hinged roof with a secret attic.

Available at spunkysprout.com, $320.

You want your kids to keep on the straight and narrow. But it’s okay to let them wander off the beaten path once in a while — into an eight-foot-tall Kids Crooked House with tilted walls and slanted windows.

Give your little one a long-lasting room of her own with Modern Playhouse. Without the distraction of built-in accessories like toy phones and sinks, it’s a blank stage that kids can turn into whatever they want.

HipHuts’s showstopping tents for toddlers are handmade by a preschool teacher in Ohio. We filled ours with floor pillows and turned it into a book nook.

Available at etsy.com, $135-$145. For more information, go to hiphuts.com.

The ecofriendly Toideloi Stackhouse Home features individual, stackable boxes that can morph into a sprawling estate, city walk-up, medieval castle, or modern chalet by simply interchanging rooms, balconies, and roofs.

Available at toideloi.com, $75-$540.

It’s a doll’s world; you just live in it. Give Miss Priss’s little friends a place of their own with My Green Dollhouse, a three-story portable house made from lightweight, recycled cardboard that can be assembled or broken down in a snap.

Available at giggle.com, $55. For more information, go to green-lullaby.com.

Put your brigade in the construction business with Crazy Forts. With one kit, kids can make a tunnel, house, rocket, igloo, and castle — or use their imaginations to muster an original creation.

Available at barnesandnoble.com, $50.