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4TU. Design United Expo Design Bridges

OverDeTop

The interactive staircase that turns the children's hospital room into a playground

OverDeTop is an interactive staircase that uses light, sound and game design to intrinsically motivate young patients to perform their necessary daily exercise. The bridge-shape allows games to be played together with friends and family.

Context and problem

When children end up in a hospital bed after surgery or illness, getting them up and moving is crucial for a good recovery. Without daily activity, children can lose up to 1.5% of muscle strength each day. Yet, young patients still spend up to 95% of their hospital stay in bed.

Sterile hospital rooms and clinical tools simply don't resonate with a child's need to play, explore, or compete. Parents often desperately want to help, but lack the means to do so. This often leaves physical activity dependent on the scheduled physiotherapy sessions, meaning children get less than 30 minutes per day where moving is actually fun

The solution

OverDeTop is an interactive, bridge-shaped staircase that turns the sterile hospital room into an active and social playground. Children only need to press the big red button to start various audiovisual games, which can be played either on their own or together with their family.

OverDeTop has been developed in close collaboration with pediatric doctors, nurses and physiotherapists from the MosaKids Pediatric Hospital and Groene Hart Hospital. This led to a design that is not only fun, but also supports effective storage and transportation by being collapsible, revealing its wheels. A 2.5-week deployment proved it easily integrated into hospital workflows and effectively got children, and their parents, into action.

The impact

OverDeTop proves that hospital stays can be about more than clinical treatment and play can act as a catalyst for physical recovery.
The unique bridge shape naturally onboards parents, turning passive them as passive observers into active coaches and competitors.

Next to the expressive games, the staircase can be used directly at the bedside. Hence, even the more hesitant players can sit on the edge of the bed and participate in many joyful moments.

Recognized with two awards at the TU/e Contest 2026, OverDeTop proves that play is not purely about fun, but can effectively support children in their physical recovery, while supporting the existing workflows of hospital staff.

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About Timo maessen

Hi! I am Timo, and I love making things that make people smile!

I am guided by a deep passion for technology and the belief that play is the ultimate medium for shaping meaningful interactions between people and technology, especially for children in healthcare.

Son and father playing the game Dance Battle

Daughter and mother dancing on the middle platform

Playing the game Ijsbreker

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