Coloring by number printable — one of our favorite activities! So much fun to follow (& change) the picture by decoding the puzzle through color. Printable color by number activities for kids of all ages. This game is a hidden object game based on just you guys. We are sure that you will easily find your keen eye. The game is easy to play. You will try to find the side or bottom of the scenes in the given object. You must be very careful and a good researcher. Check out the first hidden picture color by number worksheet in the following images.