I made these activity packs back in September. They were a desperate attempt to keep the kids busy on the plane. I had no idea just how useful they would be. We use them all the time. They are very simple to make, here's how:
Decide how big/small you want your organiser to be. I found a notebook I wanted to put in it and added 2 inches to each side. The first rectangle you need to cut from your main fabric needs to be twice as big as this [the organiser is folded in half].
Pick a main fabric, and one or two contrasting fabrics.
Lay the pockets one on top of the other and stitch down the centre to hold them together.
Make a closure tab out of lining/scrap fabric. Add velcro to the tab...
Put the pocket pieces and cover right sides together, making sure your closure tab is pinned in the correct place inside this. Stitch around the outside edge leaving a gap for turning. Turn, press, and topstitch around the edge.
You are finished. I made four different ones for my kids, and filled them with notebooks, stickers, books, pencils etc. They have worked brilliantly on planes, while away on holidays, and at church. I am considering making a slightly larger one for myself to carry things for me to do while I wait at school and dancing etc.