Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
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Child loves to sit with the adults at one table. Make it personal "chair", it's easy. Take a chair and extends his legs with wooden rods and metal sleeves from scraps of pipe of suitable...
FROM “SPIDOLY” LAB!
Instruments based on the radio. Technical progress is relentless it forces us to buy all new electronic devices, and old, but usable receivers, tape recorders, record players and tape...
