Bali is an ideal family destination -- the whole family, whether you have very young children or older children, will find something to suit their tastes in Bali. Lombok less so, as it is does not offer the same variety of activities and is much less developed than Bali.
Hotels and restaurants are well equipped for kids and babies. Nearly all have cots and high chairs and if a restaurant doesn't have a kid's menu they are generally happy to make something simple for them to eat. Babysitting is easy to organize both night and day and reasonably priced. Some of the larger hotels have specialist kids' clubs with designated children check-in. Generally, kids up to the age of 12 are allowed to share a hotel room for free, though some hotels will charge a nominal fee.
With regards to children's admission, most places offer family packages at great discounts. Children under 4 are usual free but not always, especially at water parks or animal parks.
Most supermarkets stock baby food and toiletries, albeit very expensive as most is imported from the West. There is no need to bring prams as there are very few places to use one. If you are thinking of trekking with your very young child, bring a baby carry-pack.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.