Scrunching tissue paper and sticking it always appeals to little kids, and you get a lovely textural result to put on display. It's possibly not so easy to see the shape of our autumn leaf in this picture, but the colours are lovely!
You will need:
Tissue paper in red, orange and yellow
Cut a simple leaf shape from card. You might want to do this in advance for little ones.
Rip up pieces of tissue paper, scrunch them up and glue them on!