Red Rock Canyon is a nice place to visit if you're not ready to drive to Grand Canyon just yet.
It's about 45 minutes drive from the strip. There's a fee of $7 for a private vehicle. After you pass the gate, right side is the scenic points where you can walk up to the rock for closer look. Left side of the entrance is the visitor's info. There's lots of information in the visitor's center.
Going back to right side of the scenic points, the road is one way. So if you take the scenic point you have to circle around to exit. That takes about 30 to 45 minutes to complete the circle.