My 1 1/2 year old son just learned how to open doors. Some places in the house aren’t that safe for him, but we couldn’t find anything to keep him out. Finally we found the Grip ‘n Twist door knob covers. The Safety 1st Grip ‘n Twist Door knob covers keeps rooms off limits to little ones. The holes in the cover allow parents to get a solid grip to open door, but keeps curious toddlers out. The covers glow in the dark for ease of use at night. The sleek modern design blends in with home decor.