Hands on Science Sexto: Activity 15 - Exothermic and Endothermic Processes

I suspect that any primary science teacher must dread having to talk about exothermic and endothermic processes.  These are secondary school concepts and not really very useful everyday vocabulary so here is what I've put together for teaching it in a more interesting way.  The activity has a list of different mixtures of household chemicals that the students can mix and should give a temperature change. 

This activity is connected to the Matter unit.  They measure the temperature before mixing and after mixing and if the temperature goes UP - Exothermic, DOWN - Endothermic.  None of the changes are very big, 5 - 10 oC because we want to work safely but they should be enough for the students to categorise the different mixtures into endothermic or exothermic processes.
  
Link to activity (pdf):  Exothermic and Endothermic Processes