Time for another few in the Simple Blocks series now that the summer holidays are over. Today its that old favourite, Card Trick. The colouring of this block is key to making it look as if four squares are interlocking.Download the instructions for the block here. The block has Three-Triangle, HST and QST units. One key tip our students use is to always lay all the pieces out first before you start stitching – that way you can be sure you have got those colours in the right place. It helps to make one block first before you start on a quilt – that way you can be sure the measurements are correct and your colours are right.