I have now finished the wall hanging. (Except for buying 2 x 170cm dowel for hanging - but that will wait till England)
The pockets are make with light weight clear vinyl that is sold as table cloth protector material. This material provides a few challenges for sewing - less holes is stronger than more - so I stitched with a large wide zigzag.
Also where I needed to attach the vinyl to vinyl I used super glue.
Tips: only use OLD scissors and rotary cutting blades on the vinyl - they will not be as good after wards.
The flying fox and hang glider frame are cord attached to large buttons with rubber bands to hold the dolls - all chosen for easy replacement if broken. The swing is a piece of elastic with a loop on the end. In each case the buttons have a second button on the back and they are sewn through the hanging together - this distributes the stress on the cloth if the buttons are pulled hard.
This project had many technical challenges - sewing the vinyl was not that easy and did not feed through the sewing machine very well - so the stitching is uneven. But I am sure a 2 year old will not mind.