The Oceaneer's Club is for ages 3-7. The Oceaneer's Lab is for ages 8-12. The kids are in 2 groups...8-9 and 10-12. There are sample kid navigators available on several sites, but be aware that the activities do change from time to time. While it is called the Lab, that is only the name of the space. The kids do all kinds of activities, crafts, games, etc. They make flubber, paint animation cells, play a game of "into the blender" where everyone gets a smoothie at the end, do Goofy sports, etc. In addition, they have access to computers (no internet), many music CDs, and all sorts of activity stuff.
There is also "family time in the lab" where it is open to your child with your supervision (you can play with your kid). The group without parents is elsewhere on the ship during this time.
You will get a kids navigator for her age group that covers the entire cruise on your first day. Be sure that she goes to the meet and greet on the first night. It's a good time to make a friend, and if she has a buddy, she'll be a lot more willing to do the group activities (and give mom a break!)