In Easy Step mode the Nova Scotia Children's Sports and Arts Credit is under Claim Dependant Credits. If you are using Forms mode in TurboTax CD/Download it’s on the bottom half of the Dependant pop-up screen.
If only it were that easy. Under federal claims for dependents it says "if your province has the fitness and arts credit you will be prompted later" under the provincial credits it is not showing the fitness and arts credit option!