Good topics for speeches are-
1.Clean India
2. Cleanliness is Godliness
3. Swachh Bharat Abhiyan
4. Summer winter/Winter vacation
5. Christmas Celebrations
6. Ek Bharat Shreshth Bharat
7. Unity in Diversity
8. Privatizatiin, liberalisation and globalization
9. Global Warming
10. Trip to a Hill Station