For the Mandala flower, here is a step-by-step photo gallery. To do this you start at step 1 with 7 strings attached and 6 with Einhängeschlingen on 7 folded thread. Other threads are then inserted by most of us with an ordinary shoelace knot.
Origami is a little tricky for them because they don't have the dexterity, but with a little help they made origami bookmarks and christmas trees as an activity. They had fun with it. Folded Paper Heart Book Page Marker – DIY