Hell to the fuck no. I'm going to the museum to enjoy myself and learn about cool stuff for myself. Bringing a kid is absolutely not going to result in a "great and absorbent state of mind", especially if I constantly have to worry about where said kid is and what they're doing -- I can just as well take an (adult) friend or partner to whom it is also new and wonderful if I want to share the experience with someone (and we can go someplace that's not fucking McDonald's after.)
I'm sorry that your state of mind is so terribly moribund that simply being in a cool place of learning doesn't suffice for you to learn and absorb new things and that you have to rely on an external locus to delude yourself into believing you're getting to that point.