Whats Appropriate To Register For A Baby What Is The Basic Baby Shower Etiquette?

What is the basic baby shower etiquette? - whats appropriate to register for a baby

I was invited to a baby shower for a colleague next month, but I've never been in one. What is the tag database? Registered at Babies R Us If you buy something, make this shop, the shower? Or should I order something online and directly with them? Is there a reasonable amount to spend? Please help me with what you know.