I never understood it when my friends would go on and on about their grandchildren and tell me "there is nothing like it". I couldn't understand my parents, who late in life, would drive hours to see my youngest brother's children play biddy basketball, football, etc.
This year I was blessed with two grandchildren. One a biological girl to my middle daughter, and one adopted baby boy from Russia by my oldest daughter. My whole world changed, as did DH's. Of course I love my children and I would lay down my life for them. But my grandchildren occupy a whole other part of my heart. They are my joy, and I adore them. There is a special bond between grandparents and grandchildren. I try to help my daughters and sons in law with providing for their children. No one ever helped me, and I am in a position where I can give. I pick up diapers and wipes and formula for them, and shop on ebay for gymboree clothing that they could not afford. I would never overstep my bounds. I don't show up uninvited, and I am careful not to wear out my welcome. I don't criticize, and I truly am in awe of my daughter's ability to mother these children. I am so proud of them, and tell them all the time. I don't love the grandchildren more, I love them in a different way. They are dependent and vulnerable, and I older and wiser than when I had my children. I am more patient, and I also don't have these babies 24/7. So, as grandparents, we have the time to give 100% of ourselves to our grandchildren when we are with them.
As far as the adopted baby from Russia, he will never get as much in return as he has given us. I couldn't love him more had I given birth to him myself. He is as much a part of our lives as any biological child would be. I never knew that we had that capacity to love, but seeing the initial photo of him from Russia, it was love at first sight.
I hope that this helps you to understand what it is like to be a parent and a grandparent. The love is as deep for both, but having a grandchild allows you to be the "parent" you always wanted to be to your own children. It is easier to be a grandparent - you don't set the limits or the rules, you don't have to worry about shaping the character or any of the other demanding jobs of a parent. You just provide the support and affirmation of the ideals your children have for their children.