Think it depends on the kids. Have had 2 bday parties there with ages 4 to 6 and the 4 it olds took about 30 min for them to start climbing but once they did, They didn't want to stop. The walls vary in difficulty. From easy to hard.
Not sure if the official minimum age. The bounce stuff and baby area works for a 2 or 3 year old but our kids didn't enjoy the climbing until 4.
Thanks! Your answer is awaiting moderation.