Kids Art Activity: How To: Turn an Old Book into an Art Case - definitely want to try this for my kids!
maybe more effort than i can commit but probably the best option for travel sketch kits for nature journal!
20 Clever Ways to Organize Your Coloring Supplies | Sarah Renae Clark
storage for art supplies in a vintage suitcase
Children's Art Case Tutorial (perfect for church or in the car!)
Keep your kids entertained AND spark their creativity while on the go with this DIY clipboard road trip case!
Lihit Lab Teffa Pen Cases
DIY Recycled Book to On the Go Mini Art Studio Tutorial from Crafts Unleashed.
New from Crayola, this Crayola 200-Piece Masterworks Art Case is a wooden art case filled with 200 Crayola items!
this is epic. Turn old DVD cases into traveling Art Kits for your kids!