Help me pick an activity to do with a class of 7&8 year olds

[Giblet]

Hi all, I need help! My dd's school is holding an arts and crafts week soon. My dd signed me up for one of the sessions (approx 45mins) which was fine when I thought I was helping the teacher only now I have found out that I have to host the session. I cannot back out of it as my DD will be really disappointed. I am the least artistic/crafty person you could meet. Others are doing storytelling, knitting, crochet etc. All suggestions and advice will be very gratefully accepted.

These paper hearts are very easy - same site had similar heart garlands. They are very easy.

Have you looked on Pinterest for ideas?

Ooooh lots of great ideas there - thank you all so much. Had a look at that site 3bunnies and there are some really nice ideas there - saw this and thought it would be good also as it is a mixed class: www.papercraftsforchildren.com/category/art-decorated-paper/
Miaow the cat - I love the jumping frog also - will have to get practicing. I did think about Pinterest lovesewingbee but there was just so much!
Thanks for the ideas.