I don't think it is a void of ideas, but more of a way of your brain saying this isn't worth it so lets forget about it.
Since my kid was born, every idea I have goes through a process of 'will it make money'->'how much'->'how long will it take'->'what is the actual $ amount per hour it requires' and if it falls lower than a very big number, I just ignore (and usually racionalize it as not worth it) and go play with my kid.
Since my kid was born, every idea I have goes through a process of 'will it make money'->'how much'->'how long will it take'->'what is the actual $ amount per hour it requires' and if it falls lower than a very big number, I just ignore (and usually racionalize it as not worth it) and go play with my kid.