Cool uses for potentially scrap lithium cells??

While building my powerwall from old laptop cells i came across some prismatic or pouch cells so what do you do with them?

Modify the kids electric toys of course :-)

My thingiverse page has the RC car parts i mentioned in the video https://www.thingiverse.com/chickey/designs

My mind went blank when i got to the fan but i used a 3.7v lithium to 9v step up module which you can buy here
https://www.ebay.co.uk/itm/Lithium-Li-ion-18650-3-7V-4-2V-Battery-Charger-Board-9V-DC-Step-up-Boost-Module/152704808159

https://www.gearbest.com/rc-cars/pp_203036.html?wid=1433363

Видео Cool uses for potentially scrap lithium cells?? канала Colin Hickey