Wondering, Wandering

Cardboard Castles

On the joys of open-ended cardboard play

May 30, 2026

Did you know that the cardboard box was inducted into the national toy hall of fame in 2005?

Cardboard Box - The Strong National Museum of Play
  Inducted Year: 2005 The Chinese invented cardboard in the 1600s. The English played off that invention and created the first commercial cardboard box in 1817. Pleated paper, an early form of corrugated board, initially served as lining for men’s hats. By the 1870s, corrugated cardboard cushioned delicate glassware during shipment. Stronger, lined corrugated cardboard soon followed. American Robert Gair produced the first really efficient cardboard box in 1879. His die-cut and scored box could be stored flat and then easily folded [...]
https://www.museumofplay.org/toys/cardboard-box/

"With nothing more than a little imagination, those boxes can be transformed into forts or houses, spaceships or submarines, castles or caves. Inside a big cardboard box, a child is transported to a world of his or her own, one where anything is possible"
- The Museum of Play

I always think about the Spongebob episode where Spongebob and Patrick order a TV just for the box and annoy Squidward with their antics and impressively vivid imaginations. That's really what a big cardboard box feels like to a kid!

All of this to say, cardboard boxes are an incredible material for play. In 2016, I helped facilitate a big cardboard build in the Maker's studio at the Science Center of Iowa where I worked as a Maker-in-Residence. 10 years later, I still think about this experience often. It was magical to see the way visitors transformed our space into a cardboard city with tunnels, towers, walls, and secret passageways.

Two young people standing inside of a cardboard construction, large cardboard boxes create walls, tunnels, and tubes that tower over the young people.

Recently, I finally got around to facilitating some larger scale cardboard building activities in a couple of different Makerspace settings.

I want to share some of my favorite moments, stories, and details from these experiences:

Toddler Tinker Storytime, Colorful Cardboard Cityscapes, Children's Book Pairings
A wonderful librarian and I offered a "Toddler Tinker Storytime" program at the NoBo Library. We paired Makerspace activities with toddler storytime once per month. One month, we paired "The Artist" by Ed Vere with an activity where toddlers could simply color and decorate a cardboard cityscape that was designed to look like the cities in the book.

Toddler Tinker Storytime, Colorful Cardboard Cityscapes, Children's Book Pairings

A wonderful librarian and I offered a "Toddler Tinker Storytime" program at the NoBo Library. We paired Makerspace activities with toddler storytime once per month. One month, we paired "The Artist" by Ed Vere with an activity where toddlers could simply color and decorate a cardboard cityscape that was designed to look like the cities in the book.

the artist - Ed Vere
Ed Vere website
https://ed-vere.format.com/11868702-the-artist

The book has a great message. It's all about creative confidence, finding your artistic voice, and having the courage to express yourself.

I specifically made these cardboard structures so that a toddler could feel like they were at the same scale as the dinosaur in the book, easily able to reach the sides and tops of buildings to paint colorful murals.

Having pre-built cardboard structures was appropriate for this age group. They were highly engaged with decorating and coloring. I found that washable paint sticks were a great material choice for this. They're not messy, they're vivid and bright on the cardboard, and they're easy for little hands to hold. I also offered some large dot markers which were similarly accessible for toddlers.

Kwik Stix™ Tempera Painters
Kids simply twist to create with these convenient, all-in-one painters—no brushes required! Each stick is packed with solid tempera paint that produces smooth, crack-free pictures…and dries in 90 seconds! Painters measure 3 1/2" in length.
https://www.lakeshorelearning.com/products/arts-crafts/paint-painting-accessories/kwik-stix-tempera-painters-set-of-12/s/TS997/

This activity was such a hit! One family came back and told us that they'd recreated the activity for a gathering at home and their little ones loved it.

Cardboard Build Resources
Researching is honestly half of the fun of planning new activities for me. Here's a preview of my Freeform board where I collected pictures, links, artists, tools, etc. to inspire my cardboard city activities.

Cardboard Build Resources

Researching is honestly half of the fun of planning new activities for me. Here's a preview of my Freeform board where I collected pictures, links, artists, tools, etc. to inspire my cardboard city activities.

You can view the interactive version that will let you click on links here (you'll need the freeform app): https://www.icloud.com/freeform/044zuaYyiTmgIS7KnG87Q9VEQ#Cardboard_City_Resources

I will try to update this page later with a list of links from this board.

Collaborative Cardboard Fort Building
In my Makerspace at CSU Spur, I've facilitated a cardboard fort/city/castle building activity a couple of times. It's a good passive activity (for me), meaning that I don't have to do a ton of facilitation for folks to enjoy it and have a great creative experience.

Collaborative Cardboard Fort Building

In my Makerspace at CSU Spur, I've facilitated a cardboard fort/city/castle building activity a couple of times. It's a good passive activity (for me), meaning that I don't have to do a ton of facilitation for folks to enjoy it and have a great creative experience.

I usually prep the space by propping up a couple of bigger, loosely taped together boxes in the building area, and by making sure that there's a good cardboard supply nearby:

I made some cardboard techniques posters to offer some connection inspiration, but honestly most folks just went for the tape!

I laid out safe cardboard cutters (klever kutters, ceramic safety cutters, MakeDo tools), tape, string, and washable paint markers.

I really like this paper packaging tape for cardboard builds. It blends in nicely, is easy to tear, and is quite durable:

ADHES Biodegradable Kraft Paper Tape 2 inch x 55 Yards Eco Friendly Brown Packing Tape
[Recycleable and eco-friendly] Non-PE-coated,No-chemical-ink!Made with 100% kraft paper,convenient to recycle with box without seperation.And it can be degraded by bios. Let’s protect our environment with non-plastic. [heavy duty kraft tape]This paper kraft tape has a high-tensile strength so that it can be used for sealing carboard and heavy-duty packaging for moving, shipping, or long-term indoor storage. [Writable surface] Non-coated surface for pencil,pens,water-based marker pen,oily markers and more [Easy to use]Easily tears by hand and self-adheres; no water, scissors, or knives necessary!You can also use with a standard tape dispenser. [NO noise]Compared to transparent OPP packing tape, this kraft paper tape is noiseless to use.It is suitable to use at night or when quiet is required
https://store.adhestech.com/products/adhes-biodegradable-kraft-paper-tape-2-inch-x-55-yards-eco-friendly-brown-packing-tape

My favorite part is seeing how the cardboard build grows, evolves, and changes over time. Drawstring bridges appear, signage that says "entrance" "Start here" gets added, the cardboard walls are covered in a delightful mix of paint stick graffiti messages, and decorative designs. There's something so fun about tunnels and passageways that aren't meant for adults to access. And at the same time, the structure was still accessible for a visitor in a wheelchair. The large cardboard boxes were at a great height for them and they spent quite a bit of time adding a decorative touch to those boxes with the paint markers.


p.s.,

Sometimes it's the little teeny tiny details that delight me the most. I made a few copies of this tiny cardboard sculpture to place on the front desks of our main buildings at CSU Spur to get visitors' attention and encourage them to visit the Makerspace for a cardboard activity:

Makerspace Trash
Making Examples and Making Connections

makerspace
cardboard
activity ideas

Wondering, Wandering

"When you wonder you're learning". A place to collect and share tidbits, resources, and experiments on the topics of learning to create, creating to learn, and cultivating creative spaces for makers. More @ celestemoreno.design