how can i investment my money to get maximum refund after 30 years and more?

i m 26 year old man, my family consist of 2 child 1 wife and parents, my daughter is 2 year old and son is 3 year old.
my current salary is 26000 pm. and house hold expenses is nearly 13000 pm.
so how can i invest my money to secure my future. and arrange my childrens marrages in future.
i want to invest my money to the following funds
sip, lic, pension fund, and other as u like.