Jump Jump the jumping board for kids
A board with vibration sensor for kids to jump on and it makes random sounds (copied from different place on internet and a few basic one by hand) (all thanks to respective authors for hardwork, pardon me for not documenting (due to my lack of experience -but learnign things :) ) with love from a hobbyist designer with ambition about making things
project can also be seen here https://www.instructables.com/id/Jum-Jum-the-Jumping-Board/
for 8mhz arduino read this "Minimal Circuit (Eliminating the External Clock)" https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard
Low power library by https://github.com/rocketscream/Low-Power