Cr£dit Squeeze
Now renamed The Bank Of Magic!
 
Beautifully laser cut and etched here in the UK
5 pieces of 3mm birch ply are arranged to form a 7 x 7 square containing 49 £ symbols
One £1 piece is removed - withdrawn from the bank.
The 4 remaining pieces are rearranged and the rectangle is still 7 x 7...!
 
See the video here