He takes only one nap in the day for about one n half hour is it enough??and the gap between his nap and his night sleep is 7 hours..is it ok???

Hi it can be due to colic pain and gases, hold baby vertically after every small feed and position properly to the breast so as to avoid air ingestion while feeding which is the most important cause of colic pain and gases and fuzziness

And also if she is watching mobiles means avoid it...
And also check once whether she is watching any scary cartoons or movies...
Now they can understand you,better don't talk about any scary things near her...
My son gets scared of spiders,like that your baby also might have one thought,so sit her and talk...
Indulge her in more playing activity...
Speak with her more times...

Morng me 9 am tk jga do usko.... Aur afternoon nap mat do.. ya only 1 hour.... Phir raat me jaldi sulane ka try karo... Around 10 or 11 pm... Room ki lights off rakho .... aur koi story... Ya song suna do...sone se pehle 1 glass lukewarm milk do... 11 baje uthane ki vajha se usko afternoon nap bi late hi ho rha h...isliye raat me nahi soti jaldi.... Schedule change karna padega.... Phir sab thik ho jayega....

It's not like that,as you have twins you can't take care of them at a time,you require help,so he is much interacted with his grandma,so he likes to be with her,nothing to worry,you jus show love on him,interact with him,tell him some stories like that...

It's normal in many babies but you should feed for every two hrs minimum. Tickle the bottom surface of her foot (sole) to keep her awake. Tickle or even patting on sole will keep her awake

It's normal in newborns ........but feed every 2 hourly.... wake him up By tickling baby's ear or feet.... but feed him frequently......

10 to 14 hrs. Babies sleep 8-10 hrs in 1 streach and 2-3 hrs power nap in daytime

Hehe.. I can relate to it.. My son also likes this song but doesn't demand in the middle of night..
Whenever i am not in mood to fulfil his demand i say my charging is very low like mobile phone and i can't sing... 😁

Yes ... It's normal in kids... Don't wry...and wear cotton clothes in sleeping time....