density. Less dense, then more colour. Things like paper and cotton are orange.â
âWhat is green?â
âOrange or green is for vegetable or plant matter. Brown is carbon-based.â
Amy was puzzled. She had seen the round, black shape in The Mouthâs guitar-case, even if the guard missed it. What could that be? Did it move slightly? Or was that just the jerk of the belt? Was it alive? Was he smuggling something?
âWhatâs that?â Christopher pointed to a doll-like shape in the outline of Amyâs backpack.
âVegetable matter.â
Amy didnât like to tell the guard that it was Edwina, her teddy. âCoolâ ten- year- old sleuths donât usually carry stuffed teddies in their bags. But her Edwina had been all over the world.
Strangely, the mysterious shape in The Mouthâs bag was about the same shape. Did he have an Edwina, too? Or was it alive?
Edwina was stuffed with cotton wool because Aunty Viv repaired her after a Wilhelmina snack attack. So there were no weapons or drugs inside Edwina. And she wasnât smuggling anything inside a toy, but others might be.
Christopher had an important question. âExcuse me. What colour for money? If someone was trying to smuggle money out of the country.â
âThatâs illegal. Youâre only allowed to take out a certain amount of Australian money.â
âAnd the colour on the screen? Would it show up as vegetable? Or would there be some metal?â
âDepends on how dense it was. How much of it. Now move away, this is a restricted area. You shouldnât be looking this side. You might distract our guard.â
The warning came too late. The Mouthâs guitar case had already slipped through!
A young mother with lots of luggage struggled to the scanner. She was carrying a baby capsule, holding a grumpy toddler and followed by another child.
âPut the baby capsule through, madam,â instructed the guard. He didnât see the baby inside. He thought the capsule was empty.
Looking worried, the mother put the baby capsule on the belt. She unloaded her airline bags ,too. Her other children ran ahead through the security doorway. The mother turned just as Christopher walked back. He looked sideways at the capsule...
âHey! Stop the belt! The babyâs inside the capsule!â yelled Christopher.
âWhat!â
The guard moved very fast. So did Amy and Christopher. Together they pulled the capsule from the moving belt. The felt ribbons has just started to drag across the babyâs face.
It started to scream.
âIâm so sorry, madam. The baby should be all right. The rays will not have hurt her in that short time. It only reached her feet.âThe guard looked shocked, but the mother just calmly accepted the capsule and baby. âAre you sure youâre all right?â
â Yes, thanks. Iâll have to go. The others are running wild, as usual.â
She followed her other children through the metal detector doorway.
Christopher and Amy gave each other the thumbs up sign.
âFast work.â
âI wonder what the baby would have looked like on the monitor?â
âA skeleton. The bones show. Weâve had skulls through here,â the guard said.
âWhose skull?â The twins spoke together.
The guard smiled. âSome medical doctor. He was giving a talk. It was one of his teaching aids.â
âWould a dogâs bones show? After all the excitement, Amy was sorry she hadnât seen the screen baby. It might have looked like the bump in
The Mouthâs luggage. That might have been a clue.
âThanks, you two. Now off you go and get your plane.â The security guard looked glad to get rid of them. âAmazing. You both wear glasses,
I have perfect eyesight, and I miss the baby! Amazing!â
âNothing wrong with wearing glasses!â muttered Christopher.
The Mouth had hurried through the security