Dates contain natural sugar which is easily absorbed and digested, thus, it is safe and comforting for children's stomach and intestine. And the dates juice is useful especially if we mix it with Milk to become very nourishing and restorative drink for children and adults. Dates and honey paste is used for the treatment of diarrhea and dysentery in children but it should be taken three times a day.
This paste also comforts and hardening the gums during teething and facilitates the process.
It is advisable to purchase the good varieties of dates and to wash them thoroughly before use especially when used as food or remedy for children
I dont know about the lion dates syrup but If you are worried about bottled/processed food, try this tip. Soak dates in luke warm milk and crush it well. Add that to cereals maybe and will help. Soaking in luke warm water and then blending it is also fine.