We spent about 5 hours at the Franklin Institute and even then felt a little rushed at the end so we’ll go back another time – you can truly spend a whole day at this beautiful, well-run facility with friendly staff. We had a Kid’s Book coupon which helped since entry can be a little pricey particularly if you add in the IMAX and 3D movies as we did, though it’s actually a good value considering how much time you can spend there and it’s absolutely perfect for children, can’t stress that enough. My daughter had so much fun with all of the hands on exhibits including the Big Heart, the planes, the space models. It’s also fun for the adults who can try everything out as well. Even during the NJ school vacation week in November, it wasn’t terribly crowded which was a nice way to experience the facility and the main atrium has an airy, comfortable area where you can take a break and have a snack or drink. The Pompeii exhibit started right after we left so we were thinking we need to go back sooner rather than later. All in all, a very positive experience!