Priya, for my dad's retirement... me n my hubby(i dunt have a brother) made sure to pick him up from work where his collegues threw a farewell party.My dad was feeling very secured n proud (esp because my hubby came)to board our car & come back home... not feeling lonely.
At home, mom prepared good food an we had a blast for him..made him wear garlands & we were pulling legs at each other &keeping him utmost happy.Now he engages himself very well with the internet.
so I think more than any gift...the secured feeling is

JMO.