Don’t say that you don’t like kaleidoscopes! It was a very entertaining toy in everyone’s childhood. Now you can make it with your hands for your kids. You will need 1 thin cardboard envelope or a piece of cardboard, metallic adhesive paper, duct tape, painter or scotch tape, craft knife, ruler, cutting mat, pencil and scissors. To make your triangle tube, you need to start with 3 pieces of cardboard sized 1 x 4 1/3 inches (3 x 11 cm). Mark the dimensions on the cardboard and cut each piece out with knife and ruler. Cut a piece of foil a little larger than your three cardboard pieces combined, about 4 1/3 x 5 inches (11 x 13 cm). Lay the three cardboard pieces on top of the foil and trim away the overhang. The rest of the tutorial is here.