Do you mean Ripley's Believe it or not museum? If so, we've gone to the one in Baltimore Inner Harbor. It's an odd little place, not sure I would go back but it was entertaining. I'd probably see if there's a AAA discount, Groupon or something.
My son and I have done the one in OC, MD and enjoyed it. We particularly liked the extra things though, the Mirror Maze and the laser beams that you need to weave through. We would definitely do the "extras" again.
We did this last summer and our 5 & 7 year olds enjoyed it. I don't know that we would go again this summer and a lot of the stuff they didn't bother to read or regally understand, but there were some cool things they enjoyed. There is a AAA discount and I think some of the coupon books in the hotels also have the same $1-2 discount per ticket.