I've used recycled denim, using a huge off cut from my thrifted stash, along with second hand fabric, thrifted bias tape and thread, and felt off cuts from resource rescue.
The only new material - the velcro, and Lightning McQueen patch, which I got from Spotlight over a year ago, not used till now.
Fold in half
Close up of felt pockets, I doubled up on felt for extra thickness,
and zig zagged stitched for extra support
These little car caddy's are great to pop in your bag for pre-schoolers to play with in cafes, long journeys etc.