Any explosion that occurs, intentional or otherwise, results in a pffht, not a bang. Each basic kit costs a mere R25 to R30, enough to carry out 28 experiments over the year. The Advanced kit, at R50-60 allows 54 experiments and is used at tertiary level. They are not disposable but can be used again and again. The basic box of mini-size containers of chemicals, which the teacher retains, costs only R140 and provides enough chemicals for 40 students for an entire academic year.
Kits come with manuals for teachers and worksheet for students.
Private and Model C schools however are already using them extensively. Universities and technikons have also introduced them for first-year students, particularly for those who have never had practical chemistry experience before. Now, all Colleges of Education throughout South Africa use them.