The links below show a variety of techniques for nasal swab testing in children.
https://www.youtube.com/watch?v=nO1L-oYo9TA
https://www.youtube.com/watch?v=i-wWz_SUyb4
https://www.youtube.com/watch?v=lTyBvZhLL04
https://www.youtube.com/watch?v=Ogu0vjv-E44
https://www.youtube.com/watch?v=HVP8CzDotFI
https://www.youtube.com/watch?v=7n-JfsVA8UU
https://www.youtube.com/watch?v=ar2Grm_t8X8&feature=emb_rel_end