I recently made a few buckle toys for kids birthday gifts. I purchased a few clips and buckles then used scrap fabric to assemble the toy.
This particular toy features a few different buckle styles, velcro and a zipper. These are great toddler toys because they help develop fine motor skills and hand/eye coordination.
Plus, what toddler doesn't like to clip and buckle everything in sight? I need to make one for Nora since she is constantly buckling Kolter's car seat when he's not in it :)