2D animation background for nursery rhymes video

Hello, I need a video/or series of clips of 2D animation backgrounds for a children nursery rhymes video - around 2 mins. The objective is to be able to embed/insert the singer’s motion picture (green-screen) on top of the backgrounds. (I will do this part myself) 1) For layout and shapes: The cartoon backgrounds just need to be simple (no need for a lot of motion. Also remember the background need to leave space for singer's video either on the left or right side of the screen. something like this is what I'm after: [login to view URL] [login to view URL] [login to view URL] 2) For color tones and style: pleasant/smooth colors, distinctive shapes and not too many small details in them. I attached 3 files to illustrate the style I would like. 3) Delivery time: 5-7 days with revisions I can send the translated lyrics and sequence when we agreed to collaborate. Please send together with bid the samples of your previous work and your experience. I need someone who is familiar with making children's videos and has a good judgement of what captures them / what is too overwhelming for them etc... I'm doing a project with around 10 songs and budget is limited. If your bid is good we can work more on next songs/videos. thanks Nga