Kids that act like kids

Sickly MC who has memories of her past life as a Japanese person, but still seeks safety and comfort in a reliable adults...(calls her parent figure MOM despite him being a dude since she already has a biological dad)

4 yr old orphan girl awakens to be an S-rank crafter...her system is childproofed- mission are to look for caregivers...her potions are put in bear shaped containers & she uses kids toys for crafting supplies

child MC (female) who is sickly and the youngest sibling... has an insult battle with another kid she dislikes where they call each other vegetables they dislike