Hello, Natasha,
Cirque du Soleil's LaNouba is for children of all ages and is an amazing show that my family has enjoyed a handful of times. However, it is 90 minutes with no intermission, which would have been challenging for my children to have sat still that entire length of time when they were younger. Knowing my children, it would have been better for them to be older to truly appreciate the show and to be able to sit still so that they didn't disturb others.
With that in mind, It truly is a feast for the eyes, and there is plenty to captivate children's attention throughout most of the show, but there are some slower scenes when the show is transitioning from one big performance to another one. If you click on the above link, you can watch a video to see if it looks like your children will enjoy it.
Have you taken your children to movies that are 90 minutes long? That may be a good test to see how they would do during a performance. I'd hate to see you spend the money on the show and end up not being able to enjoy it because you had to leave with a restless little one.
By the way, you won't need to purchase a ticket for your 1 year old, but s/he will need to remain on your lap during the entire performance. If you'd like for him/her to have a seat, you are welcome to purchase one at the children's rate.
Thank you for the question; please let us know if you have any more.