There are few dedicated children’s facilities in Madagascar. That said, Malagasies love children and will always do their best to accommodate families.
Many hotels provide chambres familiales or double rooms with an extra bed (single or double) geared for use by parents and children.
Disposable nappies and infant milk formula are available in Antananarivo and other large cities, but are hard to find elsewhere.
Some midrange and top-end hotels/restaurants have high chairs and games or play areas for children. Some also have dedicated children's menus.
For more information, check out Lonely Planet’s Travel with Children.