most innovations emerge from garages, rural warehouses, and small unknown laboratories
the "X" or constriction knot
there is an innate desire to create small amounts of chaos
secure two perpendicular sticks
surface tension
two family incomes at the least 
Dawid Godziek https://v.nostr.build/JvEI7S7t6Ot7lIOH.mp4
survival tip
9v + steel wool = fire https://v.nostr.build/N7SndngiTcjtEnST.mp4
sorry tin foil needed for the base if left open. we put ours against a wall.
tin foil is for the stem. no foil needed with a tumbler. i'll send you a video when i get a chance
here is another one
it works. did it with my kids using a tumbler style glass
never know what this will inspire in kids and adults learning the concept of refraction
homemade projector using wine glass and iphone
make a non-newtonian fluid with cornstarch
it changes from fluid to solid when force is applied