Is it polite or limiting?

I was at the orthodontist's office and watched something fascinating. There was a mom waiting with 4 young children. The kids were handling it well, but were running into some frustration ~ like needing a pen to work on a puzzle. When the receptionist offered a pen to one of the boys she realized it was purple and thought he might like green better so she offered him a choice. The boy said he'd like the green one but he thought one of his sisters might like the purple. When the sister went to the counter she politely asked if they had any other colors. Here's where it gets interesting . . .
Mom reprimands her for asking this. Hmmm ... I can see Mom's point of wanting to instill good manners,being grateful for the things people offer us, and saying thank you. After all, that is what we're taught.

But what if there's more? And if we don't ask then how do we know?

I saw a curious girl who knows what she likes, believes there is more to world than what is right in front of her and isn't afraid to ask for it. She was curious and polite and I encourage her, and you, to always look at all the possibilities.