Commercial hanging strips are readily available in the market. You simply have to peel off the sticker and paste them on the back of the picture and press on to the wall. Contrary to common belief, high quality strips are capable of supporting heavy weights. The ease of use makes them a favourite among home owners. Place stickers on the four sides of the back of the picture frame and it will give it enough support. The best part about them is you can simply take them off the wall when you want to change the picture.
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These hangers work on the same principal as the strips. The difference is that while one side of them is flat and sticks to the wall, the other side has a hook that goes into holes or marks your frame has for hanging. These hangers also come in fancy shapes and colours and allow you to customize your space.
Sticky courtesy: shopfittingsonline.co.uk
Roll some poster putty and stick it to the back of your picture frame. Now pick up the frame and press it on against the wall, on the position you want it. Keep the pressure for some time and you are done hanging the picture without any hammer or nail. It is especially convenient for low weight frames and posters.
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Another option viable for arts and craft sessions is to install a clothesline and then use it to hang a number of pictures. It is a viable option for kids exhibitions at school and art classes. The clothesline can remain permanent while you can easily change the pictures.
Image courtesy: makeandtakes.com