It's all part of his brilliant plan to shield their little eyes from seeing any of his recent on-air antics. Part two of the plan consists of his children being schooled at home by tutors from the Church of Scientology. That way, they have zero chance of possibly overhearing anything negative about their dad in the schoolyard.
What's part three of this genius plan of his? I think Tom is going to threaten to fire his kids, like he did his old publicist, and replace them with ones more loyal.