Lazy Nobita is in bed with a minor cold so Doraemon gives him a cap which allows a small robot to read his mind and do what he wants. This leads to the robot stealing Suneo's cake and beating up Gian, unknown by Nobita till he meets them later (both have guessed the robot could have only come from Nobita).

想买新收音机的大雄遭到了爸爸的拒绝，而跑去跟哆啦A梦抱怨。哆啦A梦拿出了进化退化放射线源，将大雄的老式收音机进化成了手表型收音机。看到道具效果的大雄开始拿道具对不同的东西实验了起来。大雄拿老鼠来实验，却没有想到老鼠变成了恐龙。还被恐龙跑到了街上。