You need a box frame ... this one I got holds a picture just bigger than A4
You will need lots of paper butterflies, so I made a stencil by printing out a butterfly that I liked.
I had my nieces name printed onto a sheet of paper that I used for the background and then tried out different layouts for the butterflies to see which I preferred ...
I had to cut the double sided tape into thinner strips, but then stuck it on the back of each butterfly.
I then put it in the box frame