A one day wonder noun phrase
Used to indicate something or someone that is effective, successful, or interesting for a short amount of time
My kids are very excited about their new toy but I know it is just a one-day wonder.
These days, the phenomenon of a one-day wonder is becoming more popular with younger people as they are always looking for new emotions.
The excitement and danger caused by taking part in activities, especially sports or entertainments
If you fall for someone's trick the first time then they are at fault.
Are you going to mess with me again? Fool me once, shame on you; fool me twice, shame on me.