Strengths and limitations
The strength of this study lies in the systematic implementation, monitoring, and evaluation of all the activities based on the original protocol of ToyBox Europe [However, there are some limitations to this study. The self-reporting of indicators in the process evaluation may be a disadvantage, particularly as most of the teachers complained that it was confusing to complete the logbook. In addition, there were too many questions to be answered and this could cause response bias among the teachers and parents [