Last year, AISE Tanzania received funding from The GO Campaign to set up Appropriate Technology Clubs at schools around Arusha. Although it has been difficult to find schools that are committed to the program, we had a really great experience with the Laroi Primary School south of Arusha.
The students were very excited to have some practical sessions and to build new technologies themselves. We worked with the 35 students in Standard 7 (7th grade) and they brought the perfect balance of curiosity, enthusiasm and inquisitiveness to the sessions. The teachers themselves wanted to help us as much as possible and get a glimpse of what sorts of activities we were running.
The most successful activities were probably having the students build their own maize shellers (for removing kernels from the cob)  and demonstrating the bicycle-powered blender. They worked with sheet metal and learned basic metal-working skills. As they worked in teams through the assembly process, they were clearly feeling more and more confident about their ability to make their own technologies. The second activity with the blender was a great exercise to encourage the students to think creatively about the machines they have around them.
Clockwise from top left: Students examine a hand-held maize sheller to identify the design features; A student uses a jig to produce the maize sheller; Bernard explains how each of the tools are used; Bernard demonstrates that the blender can be produced with material available in a market town; One of the students produced her own design for a maize sheller using old roof sheeting.
This video shows the first test of the Bicycle Blender. We were very pleased with the resulting banana-avocado juice!
 The design of the sheet metal maize sheller has been in existence for a few years now, but the manufacturing process was a clever innovation by Bernard which relies on a jig that can be produced by a local welder and makes the process much quicker and more reliable.