My theme was spy gadgets for girls. I'm very sorry but I forgot to screenshot my progress, thus only the final illustration.
Pencil sketch:

AI Vector:











I rearranged them so they look align and in order.

I later added a shadow so that they will stand out once I put the background.

I made the background using dark purple, with flowers as motif.


Finally, I put in the title "theUndercoverS" and labeled each gadget with their own specific name.