My boy is 6 months in a week and I'm teaching to settle after a kiss and a song for day naps which is working great but I cant get him to sleep longer than 30 minutes. I've tried rouse to sleep but I just wake him and then he's up and chatting. Next I guess leaving him for a while to see if he'll just go back to sleep but I'm not hopeful as I've done 10 mins of that and he gets so upset but is clearly still tired. Any advice? If his naps stay at 30 mins, do I just need to do them every 2/3 hours so he's getting enough day sleep until he naps longer??