What about blocks with "board shorts" made from many different fabrics. I forgot how to post a photo so I can't show you the ones I made....They're somewhere on this Board from a few years ago. I would suggest buying a small size pattern for toddler shorts or bathing suit, (or draw your own) making just fronts, and sewing each onto 12" blocks. Choose nice sashing and there you go. Any age would enjoy the look depending upon the fabrics you select.