Gently wipe the inside of the box with a paper towel soaked in rubbing alcohol. Let set to dry completely.

Use scissors to trim the strip of adhesive block tape to fit the box.

Cut the desired number of strips to fit into the box. Make sure the strips lay flat on the box and don't cover any ridges in the box.

Gently place the strips onto the box and press firmly to adhere. Repeat until you have the desired number of strips to fill the box.

Stick a few bricks on the strips after to make sure they line up correctly and the bricks fit well.

You can also put strips on the lid, as long as it's a flat and smooth surface.

Add Lego bricks to the box and play! When finished playing, close up the box and store it.