Wash your Altoid tin and let it dry completely. If you like, paint the edges of the top of the tin to cover the red design. You may also leave the tin as is. You may need two to three coats of paint. Let dry completely.
Hot glue the plate (the single layer) LEGO pieces to create the base on the top. You will need pieces that total 10 notches across and 6 notches wide to fit the plate centered on the tin. Or,to cover the top of the tin completely, you'll need pieces that total 11 notches across and 7 notches wide. I recommend the former combination, as the edges fit full on the tin and the configuration is easier to attain with different pieces.
Let the hot glue dry well. Package Lego pieces in the tin, and gift to kids!