Hi, Susanne!
Meals can be shared if ordering off a menu. Meals cannot be shared at buffets, family style meals, dinner shows, or any type of all-you-care-to-eat dining locations. Only one beverage is included with the meal, so if your daughter orders her own drink, this will be an additional charge.
If your daughter is age 3 - 9, her credits are for kids meals. If she is age 10 or older, her credits will be for adult meals.
As far as giving your credits to other members of your party, the
official wording states:
"Meals are non-transferable between party members and expire at midnight on day of check-out."
If you need further clarification on the
rules of the Disney Dining Plan, feel free to speak to your server at any restaurant, your Resort Concierge, or call a Disney Dining reservationist at (407)WDW-DINE. I hope this information helps.