Those Altoids tins are used for so many projects that I wonder if some people throw the mints away!
Here are just a few of the Altoids tin projects at Instructables. You can do a search for them there & find almost a hundred maybe. These are fun and most are useful. Your kids might like to try some to make as gifts.
The survival kits are great for just about anyone. Keep one in the car and your purse. They are good for hikers, hunters, fisherpeople, skiers, campers, bicyclists, and anyone who spends time outdoors.
Click title for link at Instructables.