They can send a rocket millions of kilometres and land it precisely on a certain point on the moon. Now we use that precision in a technology parents around the world would find helpful - a child finder. Just like those clickers you can get so you can always find the car in a large car park, this little gizmo emits a special sound to help locate that kid of yours that always wonders out of sight. Or use it on the special "quiet" mode, which negates your child's vocal chords so the whole shopping centre can avoid the anguished moans of a child denied the latest toy/lolly/ride. An optional extra is an electric shock, for those special times. Sounds are like mobile phone ringtones, downloadable at very inexpensive rates. Upgrade to the new version with strong electromagnets that enable you to "retrieve" your child without leaving the comfort of where you are.

Available now from all good pet shops.