Hi norshahriyah y,
You confused TA forums with a travel agency. We do not create intineraries for members, nor do any planning for them. TA is all about Self planning, Self organization and self sustained Travel.
You can browse the forum though and see the itinerary samples ....
For the Lembang stay, just have a look at "things to do" at the top of the page as there are so many of them. Choose what interests you. There are lots of places that would interest kids.
For the Hilton, access to the hotel is not easy and that part of Bandung is always very congested. It's not particularly child friendly either although the rooms are really nice especially if you can get one with a view north,
Similarly it's pretty easy to check on things to do in the city in "things to do" at the top of the page. If you can do some research and come back to us with an itinerary or specific questions then we can help a lot, but only you know what kind of things you like to do, not us.
Note: for safety and security reasons I wouldn't recommend to stay in Airbnb. Choose a proper hotel instead.