Question Author
Make a cardboard disc and colour it up a bit, then make two hoes near the centre and thread string through them to make a loop. You could make the disc spin by gently pulling and releasing the loop between two fingers (different hands).
My first penknife I bought on holiday with saved-up pennies. Mam said " be careful not to cut yourself." I knew that penknives were not very sharp, so I tried the edge on my thumb and cut myself. I felt an idiot.