First let's consider invitations.
Pin the tail on the donkey
Consider what Molly's birthday scene looks like. Consider decorating in red, yellow, green and blue like the cover of her book. Or for a more patriotic look add flags to centerpieces.
Have balloons and streamer in red, blue, yellow and green. For more patriotic theme: red, white and blue.
Big Band & Swing: Frank Sinatra
Request that guests bring their roller skates and play jump rope. Print out scripts and have each guest read a part to record your very own radio show!