Same applies for my girl. It's their growing stage. My girl loves to suck her hand & drool alot. I will just take away her hand & wipe away her saliva. She is not taking noon naps as well, always wants people to talk/play with her but she sleeps longer hrs at night.
i guess its part of their growing stage and they want to explore. sucking hands is normal for baby, especially drool their saliva.
Thank you mummies, this means i dont have to be too worry :)