Below is a PHE Scotland video of a child being vaccinated, which may help children prepare:
https://www.bing.com/videos/search?q=Fluenz+administration&&view=detail&mid=761A8ACE0DF846A6229A761A8ACE0DF846A6229A&&FORM=VRDGAR&ru=%2Fvideos%2Fsearch%3Fq%3DFluenz%2Badministration%26FORM%3DHDRSC3

There is a short video on this link to Flu and how we can protect ourselves: 
https://sharegoodtimesnotflu.co.uk/vaccination-info.html

“Child flu vaccination explained” with Dr Ranj and Emily Norris: https://sharegoodtimesnotflu.co.uk/