How to be tax efficient while going for long-term investment plans

I am 44 years old and employed with an MNC. My current investments are in FD, PPF, MIS, NSC, VPF and NPS. I want to start a portfolio in mutual funds to fund the marriage of my two kids. One in 10 years and another in 15 years. I can spare up to Rs 30,000 per month for the same....