German researchers distilled proven interventions into five nudge modules for daycares—low-cost, high-impact, zero pressure.
What unsustainable behaviour needs to change:
Despite being served daily, vegetables are often left uneaten in German daycare centres. Children reject unfamiliar foods due to food neophobia, lose interest when vegetables compete with more appealing options, and lack autonomy when portions are pre-plated.
Yet daycare lunch happens in supervised, communal settings where routines repeat predictably—creating an untapped opportunity to strategically shape lifelong eating habits.
The Green Nudge:
The researchers reviewed proven nudges to identify what makes healthy eating easier for young children. These interventions can be summarized in five modules:
Module 1 – Repeated Exposure
Serve vegetables as an „appetizer“ before the main course. Colour sort them on plates. Cut them into playful shapes. These presentation changes reduce neophobia and increase intake when repeated regularly.
Module 2 – Autonomy & Self-Serving
Let children serve themselves from central bowls. Self-serving increases acceptance and teaches hunger-satiety regulation. Strategic use of vessel sizes creates visual defaults without pressure.
Module 3 – Social Modelling
Staff eat visibly alongside children, showing genuine enjoyment. Seat adventurous eaters next to cautious ones—peer influence measurably shifts eating behaviour.
Module 4 – Environmental Design
Warm-coloured walls, appropriate lighting, and clear separation between eating and play zones reduce distractions and help children focus during meals.
Module 5 – Imaginative Menus
Rename dishes with playful language—“grass-green frog soup“ instead of „pea soup.“ Post illustrated menus in hallways. Use stickers to highlight vegetables and water.
The Results: Combinations of nudges are more effective than single interventions—low-cost implementations (under €5 per child) deliver substantial behavioural change when designed systemically.
The Business Case: This approach delivers measurable outcomes at minimal cost. By reducing food waste, it lowers disposal and catering expenses. At the same time, higher vegetable intake improves children’s eating behaviour. For educators, it offers simple, evidence-based tools that integrate into daily routines without added workload. Parents, in turn, see tangible commitments to health outcomes. Overall, the system is scalable, low-barrier, and designed for real-world implementation.
Do you know of any other nudges that help to drive plant-based adoption?
Share your thoughts: hello@green-nudges.com
From researchers from Albstadt-Sigmaringen University and the University of Potsdam. Led by PhD Student M.Sc. Jo-Ann Fromm in the team of Prof. Dr. Andrea Maier-Nöth, with contributions from Prof. Dr. Astrid Klingshirn, Prof. Dr. Gertrud Winkler, and Prof. Dr. Petra Warschburger, the team systematically reviewed evidence-based interventions tested in German daycare settings as part of the „Start Low“ project funded by the Federal Ministry of Food and Agriculture.
