I used to make friendship bracelets (embroidery floss, knotting) during staff meetings so that I could pay attention to all that information and talking. If that would be of interest but concerning due to gender norms in class (although I find the whole idea of "boy hobbies" and "girl hobbies" to be silliness), then maybe these could be made for some purpose like fund raising or donation that would "legitimize" it.