I'm using this selfmade patch for my bags also t-shirts.You can copy exact my shark or you can craft your own one,is so much more interesting if you are making your own,or kids can help you,even inspire you,with some of their simple shapes
Step 1: Sketch
Sketch shark body,master the sketch so you are happy with results and you can reuse this pattern milion times,so do it right!
Step 2: Cutting out the pattern
I cut my pattern in two peaces,just because I'm thinking is more interesting this way,I can put two different colors and make it more interesting,instead you can still go ahead and make it a one peace shark!
Step 3: Cut and Sew Patch in Fabric in Desired Colors
...and place it on your favorite white t-shirt,your blank canvas bag...or get even more creative...What i do ,I sew it on with right button hole stich,all along the edges,and I change thread for different colors,also i thread in eye,nose....How you gonna design it and add/take out is so individual!
Enjoy the project.