I want a toothbrush! Design Activity

Short design activity based on a client's needs. Should last approximately 4 lessons, including one lesson to present to the class (depending on class numbers). Students to work in groups on designing a toothbrush. You pose as an awkward client with specific needs. Each pair can ask you five questions about your design needs. An outline of this can be found in the teacher notes. The aim is to get students to consider what they need to know from a client in order to design a product for them. You get to pick the best product at the end.