Here's my inspiration image by Jessica Nielsen.

 

My 10 observations:

1) Simple shapes 

2) Fun colors

3) Pops of contrast - black

4) Monochromatic palette 

5) Repetitive / lack of blank space

6) Modern / abstract

7) Imperfect / unexpected

8) Simplicity

9) Limited color palette

10) Cute

 

Sketches. I just used a regular old pen that was handy while my 4 y/o fed me ideas. Thus the random menagerie.

 

Final(ish) design.