How do we in school take care of the enthusiasm children show for biology? Unfortunately lack of exciting practical work and boring biology lessons seem to make science less popular. In Journal of Biological Education different authors have contributed to the debate. I want to give my contribution in the form of examples of very easy experiments on plants. As a senior lecturer in plant physiology at University of Karlstad I have simplified experiments intended for students at university and then tested them on 10-11 year old pupils in compulsory school. Pupils have cultivated seedlings of peas in normal day/night conditions and in darkness during two school weeks. Differences in length, form of leaves and colours are striking and easy to explain. Besides these clear results the experiment has many advantages: it is easy to prepare and carry out, it requires very little equipment and it is cheap. The theory is simple and most important: it stimulates to further studies in biology