Grandparents' first visit to mega baby store

My parents have finally arrived here at the States. Yesterday, we went out shopping and stop by Babies R Us, they were amazed of how much different baby stuff there is, including the bouncing baby seat, which almost give me a headache just by looking at it vibrating. It's the Chinese tradition that grandma has to buy the baby carrier, so she did. It's funny now that when we go baby shopping, I started to call them grandpa/ grandma.....