I live in Jakarta.

Most hotels are family friendly, with good pools. Its traditional here for families to go on holiday to 5 star hotels in the city when the maids are on holiday. To do for small kids? There is a book "Jakarta for the under five's" available at bookshops here.

There's a sea world and amusement park up at Ancol, and "taman mini indonesia" down in south JKT (mini Indonesia theme park) They keep my 3 year old nephew happy when he comes to visit.

Caritas has OK beaches, and is near the city.

For those asking for "interesting stuff" the hot/ trendy bars are constantly changing (Blowfish is so last year darling...) Meat market bars don't change so much (BATS at Shangri La, Tiga Buluh at Meridian, anywhere in Blok M in decending order of seediness and price)

Ratu Plaza has the DVD/CD/Electronics in a down town location, and air conditioned.

Personally, think all Crystal Jade outlets is mediocre to poor. Halal yum cha? Ah Yat Abalone is more Hong Kong taste/ style. YVMV

Indonesian food - hah there is no such thing! Some of the better ones we have found:

Warung Daun for Sunda
Beautika for Manado (or Chamoe Chamoe for less spicy version)
Sari Bundo II for Padang
Soto Pak Sadi for East Javanese (though, still not that great)
Sogo food courts have good casual food (nasi liwet/gudeg/udak, different types of soto etc.) And Sogo's Warung Kopi is also a good take on sanitised street food, - the beef rib soup and ayam penyet are very good!

Dharmawangsa has good "up market" food court Lesehan. Buffet at special occasions has good local foods (e.g. idul fitri buffet)
Bengawan Solo (Hotel Sahid Jaya) for Rijstaffel, but a cheesy 70's atmosphere, that can be fun if in the mood
Hotel Borubudor for sop buntut
Marriott hotel for best hotel buffet (all kinds of food)

There are some very good Japanese & Korean places. No decent Thai food. Riva and Dharmawangsa the best western "fine dining"

All the above, in my opinion!

If you ever go to Malang, Hotel Tugu Park has excellent local food (East Javanese) They (the Tugu group) are opening a "nonya" restaurant in JKT soon (Dapur Babah), which, if nothing else, will be beautifully furnished. Will let you know.