Cut new closing flaps at the end of the box you had to cut and angle corners in slights. Mirror the flaps on the bottom of the box.
So with two boys birthdays coming up (and my darling Mum's). I've been thinking a lot about presents and wrappings, Here is an easy recycled gift box - you could paint/stamp/sticker/decorate the outside or use some pretty ribbon. Basically you are turning a box inside-out.
1. Cut off top to size you need. try to open the box at the adhesive to keep the flaps rather than tearing it or cutting it.