Why the Cardboard Box Outperforms the Plastic Playhouse | What Neuroscience and Architecture Teach Us About Play

Most parents recognize the moment.

A carefully chosen toy sits untouched, while the cardboard box it arrived in quietly becomes a castle, a cave, or a place to hide.

It may look ironic. In reality, it reflects something deeply intelligent about how children play.

Children are not always drawn to more features. Often, they are drawn to more possibility.

Open Materials and the Science of Play

In early childhood research, materials like cardboard boxes are often described as open-ended materials or loose parts. These are objects without one fixed purpose. They do not fully instruct the child how to play, leaving room for interpretation, experimentation, and storytelling.

Educational theorist Simon Nicholson described this idea in what became known as Loose Parts Theory. His central argument was that environments become more creative when children can move, combine, redesign, and reinterpret the materials within them.

Research comparing different kinds of play materials suggests that the structure of a material can influence how children explore and solve problems. A toy with one clear function can be useful and enjoyable. A neutral material can invite a wider range of responses because the child must decide what it means and what happens next.

This is one of the ideas behind Faefold's approach to open-ended play: provide a child-sized structure, then leave the story, decoration, and meaning to the child.

Creativity Begins Where Instructions End

When toys arrive with buttons, sounds, characters, and a built-in script, the child's role may be more reactive. When materials are simple and adaptable, the child has more opportunities to become the author.

Studies of divergent thinking and play suggest that flexible materials can encourage children to generate multiple possibilities from one starting point. A box may become a shop, a rocket, a reading nook, or a castle, sometimes within the same afternoon.

That kind of thinking can support creative problem-solving, persistence, and collaboration. It does not mean that cardboard is automatically better in every situation. Plastic structures are more resistant to moisture and may last longer outdoors. The advantage of cardboard is different: it is lightweight, markable, adaptable, and easy to personalize.

A cardboard castle playhouse offers a useful balance. It provides a recognizable structure while keeping enough of the surface and story open for children to transform it.

Why Children Build Forts

Across cultures and generations, children build forts, dens, and hideaways. Educational researcher David Sobel described these as special places: small, child-created environments associated with privacy, ownership, and control.

These spaces are not necessarily about escaping. For many children, a defined space can offer a temporary break from a busy room and a place where they control the rules of play.

Cardboard naturally supports this kind of experience. It creates a visible boundary between inside and outside, but remains light enough to feel temporary and transformable.

For a deeper look at this instinct, read Why Children Build Forts and What It Gives Them.

Ownership, Pride, and the Value of Making

Psychologists use the term IKEA Effect to describe the tendency to value something more after helping to create it. Research has found a related effect in children from around age five, although the strength and reasons for the effect vary.

When a child colors, decorates, or helps shape the identity of a cardboard structure, it becomes personal. The marks matter because they record the child's decisions.

Working on a large three-dimensional surface can also exercise hand control and spatial thinking. Children move around corners, reach across vertical surfaces, judge size and placement, and see how a flat drawing changes when it wraps around a structure.

Read more about this kind of embodied making in Learning Through the Hands.

Learning Through Physical Feedback

Cardboard behaves differently from a rigid finished toy. It bends under pressure, becomes stronger when folded or reinforced, and shows the effects of use.

This physical feedback can create small opportunities for cause-and-effect learning. Children see that pressure changes a surface, that balance matters, and that materials have limits. The point is not to turn play into a lesson. The learning happens naturally through interaction.

What Pediatric Experts Recommend

The American Academy of Pediatrics encourages families to choose toys that support interaction, imagination, problem-solving, and child-led play. Its guidance favors simple, hands-on toys over products that mainly entertain the child through automated features.

This does not require rejecting modern toys. It means preserving enough time and space for children to direct the play themselves.

Choosing Space Over Spectacle

Children do not always need more features.

Sometimes they need more room to imagine, decorate, hide, pretend, and change the story.

That is the strength of a cardboard play structure. It is not completely undefined, but it is unfinished in the ways that matter most. The child supplies the identity.

Faefold was designed around this principle. You can explore the Faefold cardboard castle playhouse, learn more about the way we design for open-ended play, or read about our approach to cardboard, packaging, and recyclability.

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References

• Nicholson, S. (1971). How NOT to Cheat Children: The Theory of Loose Parts. Landscape Architecture, 62(1), 30-34.
• Pepler, D. J., & Ross, H. S. (1981). The Effects of Play on Convergent and Divergent Problem Solving. Child Development, 52(4), 1202-1210.
• Sobel, D. (1993). Children's Special Places: Exploring the Role of Forts, Dens, and Bush Houses in Middle Childhood. Wayne State University Press.
• Norton, M. I., Mochon, D., & Ariely, D. (2012). The IKEA Effect: When Labor Leads to Love. Journal of Consumer Psychology, 22(3), 453-460.
• Resnick, M. (2017). Lifelong Kindergarten: Cultivating Creativity Through Projects, Passion, Peers, and Play. MIT Press.
• Yogman, M., Garner, A., Hutchinson, J., et al. (2018). The Power of Play: A Pediatric Role in Enhancing Development in Young Children. Pediatrics, 142(3).
• Healey, A., Mendelsohn, A., et al. (2019). Selecting Appropriate Toys for Young Children in the Digital Era. Pediatrics, 143(1).

This article is for general informational purposes only and is not medical, developmental, therapeutic, educational, or professional advice. Faefold is a play product, not a therapeutic or developmental treatment.