experiments The introduction describes a situation from everyday life related to the experiment. When children can relate to the scientific concept from their own experience it will be easier for them to understand and remember the experiment. The list of ingredients contains the materials needed for the experiment. In order not to create any extra thresholds for doing the experiment, only cheap household materials are being used. With every experiment meta information is provided. This is a list of: the estimated length, the estimated minimum age, until what age help is recommended, the number of children needed to do the experiment, the related sciences and the related scientific concepts. With several simple steps the experiment is being described. Each step contains only one action. Some steps are clarified with an image. If help is needed from a grown-up this is explicitly mentioned (in case of the use of matches and awls). Some questions are added to each experiment. The questions are meant to make children think beforehand, to make them observe and describe their observation precisely, and to let them think of a possible explanation. The explanation contains the answer to the questions and explanation to what happened in the experiment. The explanation is intended for the student. Some extra information is provided for those who want to know more. This can be a student, a teacher, a parent, etc.