We asked for input from the 4th gradechildren to help us formulate our message about sustainable fuels. At short notice Lara developed an instructive programme for 1,5 day. The children learned a lot about the importance and types of sustainable fuels.The teachers saw how different learning objectives were achieved and also grandparents were invited as ‘assertive public’. For us it was very inspiring to see how ‘clever’ the future generation thinks about this subject and how you can bring complex messages in a straightforward way.