We went with DW, DS6 and DD3. They all thought it was one of the highlights of the trip. We videotaped most of the experience, and the kids still want to watch it once a week (and we were there 2 years ago!). We just found out that they moved the renovation time back, so it will be open when we go next week. The kids are so excited! We thought we'd have to skip it this time.
I'm not sure about the oil, but if you tell them when you check in, and also tell the chef, I would think they'd be able to accomodate your needs.