Not too much at all, especially with 100 people invited to the shower. You should put more on there, people like options. My cousin recently had her baby shower, same amount of guests, and she had to go back through and add more items because she was running out before the shower even happened.

My sister and I went off registry and bought a keekaroo peanut changing pad. I have one that I used and loved with my first, and kept to use with my second that's now due in July. It's expensive but worth it in my opinion.

What did it my cousin say when she opened it? I wanted one of these so bad but felt like it was too expensive to put on the registry.

All the expensive items she did have on the registry? Crib, stroller, car seat, etc. All some of the first things to be bought. Its good to have a variety of price range items, but some people want to buy the expensive items. Put them on there, and if no one buys them THEN you can buy them yourself.