Unfortunately this is one of the things we didn't manage to do while in Hanoi. The shows are about 45-50 minutes long and while they are suitable to see with kids, you'll need to decide if it's something your kids will happily sit through.
The Thang Long Water Puppet Theatre is located in Hanoi’s Old Quarter near Hoan Kiem Lake. Water puppet art is a centuries-old part of the Vietnamese culture, featuring traditional music.
It is recommended to arrive 15 to 20 minutes early for a good seat, especially if you're visiting with kids. The puppets are little, so it's recommended to sit near the front for the best views.
Tickets can be purchased from the theatre box office or the official site rather than street touts, bring cash just in case, and expect modest seating and limited accessibility for prams. There is also air conditioning inside the building.
Ticket Prices: 100,000-200,000 VND / person ($6-12 aud)
(prices vary depending on seat selection, children may be admitted at a lower cost)