This is the birthday card I made for my grandson.
Although it can't be seen from the photograph, I used a spring to attach the head to the card to make it wobble.
It was very effective!
Since I made the card, I've seen an idea by someone else who "plaited" a strip of paper, which she used as a spring.
I'll give it a go when I get home and see if I can work out how she achieved it.
Until tomorrow, happy crafting.