A Simple Children's animation Video

My company has created an Alphabet song for children that we want to bring to life via 2-d animation. For this video we would like the back drop to be in outterspace, Also as the letter are chanted we would like them to flash across the screen with a science feel to it. (astronauts, spaceships, and aliens) the song is 1min and 30seconds long. Here are a few examples of what we are looking for [login to view URL] [login to view URL]