How to make your own blocks for CSDTs Unplugged

1. Print out an image of the blocks: download here (as pdf).


2. Cut out the paper image of each block with scissors


3. Cut blocks from plastic, or wood, or old extension cord--whatever is available. We found this square plastic pipe for electrical wiring in Kumasi: only 2 cedis for 10 feet! Cut lengths to match your paper blocks. Here we used a hacksaw with the pipe clamped in a vise. You can use flat paper strips but they are hard to hold and they slide around too much
cutting cuts

4. Wrap clear postal tape around each block.


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