Maybe through the eyes of 18-month-old Shelby, the tiny button batteries for their jack-o&rsquo;-lantern candles looked like cookies. Or cereal.</p><p>To her 3-year-old sister, Bailey, the discs looked like pennies.</p><p>As their dad took a quick shower Halloween morning, Shelby toddled to the kitchen, climbed up the table, popped a battery in her mouth and swallowed it.</p><p>Big sister Bailey knew that was bad. Daddy! Daddy! Shelby just ate a penny! <em>Penny?</em> Their dad thought. <em>What penny?</em></p><p>Brock Thompson looked at Shelby and saw she was breathing fine. He scanned the table. Most of the batteries were still in the package. Most, not all.</p><p>One was on the floor &mdash; with teeth marks in it.</p><p>Shelby spit up. Instead of the familiar odor of sour milk, Thompson smelled the acrid stench of metal.</p><p>&ldquo;I freaked out. I thought maybe it was melting her insides,&rdquo; Thompson recalled. </p><p>He called his wife, Sarah Thompson, who was running errands. They called their pediatrician. Waiting for his return call, they jumped online to read. Shelby threw up more. The Raymore family raced to a Kansas City emergency room. After taking an X-ray, physicians sent them on an ambulance ride to Children&rsquo;s Mercy Hospital.</p><p>The battery had lodged in Shelby&rsquo;s esophagus. Endoscopic surgery removed it. Still, in four hours, one side of the disc battery had burned away, exposing its black surface. </p><p>Shelby is fine, now, said Brock Thompson. But she&rsquo;ll be hearing about this baby story for years to come. </p><p>&ldquo;You know, it&rsquo;s one thing to take away something dangerous &hellip; But I had no idea that something high up on the kitchen table was such a threat. I felt terrible.&rdquo;</p><p>Nationwide, button batteries are ingested by some 3,000 people a year, according to the National Button Battery Ingestion Hotline in Washington, D.C. The button batteries are in more products year after year, found in a variety of objects from watches and clocks, cameras, key chains, remotes, greeting cards, shoes and lighted jewelry.</p><p>Gary Wasserman, a pediatric medical toxicologist at Children&rsquo;s Mercy Hospitals and Clinics, said, &ldquo;Although 90 percent of those ingested batteries pass through without any harm, all of the incidents require a trip to the emergency room to get an X-ray to make sure it didn&rsquo;t get hung up in the esophagus or food canal,&rdquo; he said.</p><p>Through a child&rsquo;s eyes, so many things look like something good to go in their mouths, he said. &ldquo;Mothballs could be marshmallows. Pine oil cleaners could be apple juice. Powder cleaners could be parmesan cheese&hellip;. Pennies get stuck in throats. And those toys with magnets can cause some real problems.&rdquo;</p><p>&ldquo;You have to stay ahead of the child&rsquo;s development to really try and see things the way they do,&rdquo; he said.</p><p>Child-proofing your house can be as easy as crawling around, he said.</p><p>&ldquo;Get down on all fours and look around. Think like a child and you&rsquo;ll see the dangers.&rdquo;</p><p><hr class="infobox-hr-separator" /> <div class="infobox"> <strong><span class="infobox-head">Where to get help </span></strong><br /> &bull; If anyone swallows a battery, call the 24-hour National Button Battery Ingestion Hotline at 202-625-3333. Call collect. Go to www.poison .org/prevent/battery.asp</p><p>&bull; Or call the Poison Control Hotline at 1-800-222-1222</p><p></div>