This DIY Arduino Robot Car kit is 18% off in our shop 

https://store.boingboing.net/sales/sainsmart-4wd-robot-car …pic.twitter.com/kT7W3Fw4Do
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This DIY Arduino Robot Car kit is 18% off in our shop 

https://store.boingboing.net/sales/sainsmart-4wd-robot-car …pic.twitter.com/kT7W3Fw4Do