Its very important : 

Children are the future ..they need to grow receiving lots of love, compassion , kindness and happiness so they grow into wonderful adults 

Elderly vulnerable people have seen so many ups and downs in their lives so now being elderly they need to be treated with respect, compassion, and spread happiness in their lives ...just think one day you will be old and you would like to be treated with respect, compassion and kept happy so the same applies to the elderly of today