If you’re one of those people who stand at a bakery window admiring artfully frosted confections, it’s time to start creating rosettes, basket weaves, ribbons, and swirls, none as tricky as they look. Progressive Prepworks Decorating Bulb Kit (one red bulb plus 3 piping tips, $10; two bulbs in red and blue plus 6 piping tips, about $20) will be indispensable. Fill the microwave-safe, silicone bulb with icing, buttercream, or syrup, screw on a stainless steel tip and squeeze the bulb to create decorative patterns. Your own designs might turn out to be works of art. Available at Kitchenwitch, 671 Centre St., Jamaica Plain, 617-524-6800; KitchenWares by Blackstones, 215 Newbury St., Boston, 857-366-4237; and Tags Hardware, 29 White St., Cambridge, 617-868-7711ANN TRIEGER KURLAND