We had been to WDW many times but had never done Mission Space. Last August on our family trip I left the kids (dd-9, ds-7, dd-5) with my DH while I rode alone on the green side. It is really just a simulator movie so if your kids can handle soarin and star tours they would likely be OK on Mission Space. After I rode and saw what it was like for myself I had my DH go on with the 3 kids. They all loved it.