Kerala Trip 2007- The day before we travel

Its the day before we travel; Pranav's got vaccinated yesterday for his 4th month and has been running fever since. He is getting back to normal but still there is some anxiety around his reaction to the moving train ! Though the suitcase has been packed , last minute shopping continues. It is 45 degrees here in Delhi and getting scorching day by day. Looking forward to the green and rainy blankets in Kerala. Enroute we have one day in Chennai so need to think ways of killing time...could window shopping be that killer ???