Big sister made simple sunnies at daycare, which made little brother so jealous that we had to make him ones after our forest tour at home. We only happened to have yellow “lenses” at home, that is coloured plastic pockets but he did get to choose the colour for the frame. Very simple to make but they offered a multitude of entertainment for the whole evening (“look, that is yellow/pink”).
Would be quit easy to craft in a hotel room too, I’m sure the front desk could lend their scissors and stapler if needed. Here more ideas for simple crafts to be made in a hotel or on an airplane.