Another complicating factor is whether you download the file or a page, print a page, or sign up for an emailed download. All three work, but some form of file will be most flexible. Usually you have to pay for that.
_ Choose a word of interest to the person who receives it. Suppose, for example, that Grandma has apple decorations all over her kitchen. Your puzzle word could be APPLE. Make a rectangular puzzle that is about 12 x 12 squares. Write the word APPLE inside in different directions about 4 or 5 times. Then fill the blank spaces with A, P, L, E until all the spaces are full. Cut out the puzzle. Glue it onto a piece of red construction paper cut in the shape of an apple. Then ask Grandma, "How many times can you find the word APPLE?" She will be delighted, to the core! You can think of lots more fun words like this to hide.