You're idea sounds fine to me. Some suggestions for introducing? Before reading:
Ask them what it means to be curious; have them share times that they have been curious.
Ask them what they know about curious george. Let them share. Ask them if they've noticed a pattern in curious george stories; what usually happens when george gets curious?
Introduce title of your book; what do they think george will be curious about in this story? What will probably happen? Let them predict.