This is a fun project that gets children looking at similar hues of colour and the subtle differences between blues or reds etc. The first thing i do is find a popular painting or image and pixelate it on Photoshop or a similar editing software. I then crop into 10 x 10 cm grids and cut them out. I also give the children a 10 x 10 cm squared empty grid that I photocopied onto watercolour paper. They then have to try to match the corresponding colours carefully to ensure our finally picture works. It also helps to improve their brush skills in small areas - keeping inside the lines! The children love it when they see the final piece connected together, so let them guess and keep it a secret as to what it will be until the end.