String Shot
thingiverse
A string shooter designed with my little girl, designed around this parts kit: https://www.amazon.co.uk/gp/product/B094XCSR82/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 print off two wheels and one body, wrap the motors in a couple of wraps of electricians tape to give them a bit of flex but a tightish fit, solder the wires so the motors run in opposite directions and drop a bit of hot snot on the wires and switch to tidy it up. I liberated two 18650 batteries from a cheap 12v powertool battery from Lidl you'll need to make a loop of string, use a synthetic 2mm string and fuse a loop together by using fire..!
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