This a no-frills spot maintained by the Commonwealth of Massachusetts. The quality of the trails varies by season. If it has been rainy, expect some ruts.
What you'll see is a large area of dinosaur tracks of various sizes in their natural state. It's obvious that a family or two of small dinosaurs used this area near a water source. Another thing the kids always find fascinating is the fossil remains of the water itself. You can see ripples in the stone surface where shallow water had been running over it.
A little farther down the hillside, there is a spot where you can look up and down the Connecticut River. It is a very scenic area, and if you tie in a discussion of how the river formed the valley after Lake Amherst disappeared around 12,000 years ago, everybody learns something without being hit over the head with it.
Parking is limited in a turnout off Route Five on the Northbound side, but crowding isn't apt to be a problem. Remember, it a self-guided experience and there are no rangers present, so use common sense about safety.