The term “gadget” has come to mean “mobile device accessory.” Whether you’re playing sports, adding appliances to your home or simply making a fashion statement, your purchases typically have some tie-in with your smartphone or tablet.

This year Scientific American presents 10 new gadgets that treat your smartphones and tablets as the center of your universe. The LEGO charging station, 3-D-printed headphones and levitating wireless speaker work directly with mobile devices to keep them powered up and sounding good. Others—including the motorcycle helmet heads-up display, fashionable personal alarm and smart desk—extend a mobile device’s capabilities in an attempt to help keep users safe and healthy.