The tour is very similar to a real caving tour, there is no light and no paths. But there is a guide, normally most of the equipment is provided, and it costs a fee.
Most grottos make very similar tours for new members.
Normally there is no fee, despite the members fee. So it is much better to look for a grotto nearby, become member, and do some caving. But this trips offer people a chance to get a taste of what caving is like, before they join a grotto. Most of those tours are connected to a show caves. Some of them are made by adventure companies, where caving is another extreme sport beneath bungy jumping and canyoning.