1 2022-05-26 四年級 Circuit Scribe: Draw Circuits Instantly - YouTube

Circuit Scribe is a rollerball pen that writes with conductive silver ink. It makes creating circuits as easy as doodling.We're now retail at https://www.cir...

2 2022-05-26 四年級 LED circuit using a graphite pencil - Science Project Ideas - YouTube

Science Projects In Tamil has assembled a vast collection of science project ideas written by science teachers, professional scientists, and educational cons...