Just to add a bit more fun to the party, you could think of a theme that would fit the occasion. A baby shower can be considered a theme if it's not a baby shower you're throwing (just like with a birthday party or a wedding). Just my 2 pennies worth.
To keep it simple, consider a colour theme such as a lavander-themed baby shower. With this, everyone is encouraged to wear lavender and bring lavender gifts. You can also decorate the party venue with lavender flowers.
