Help, I Shrunk My Friends (2021) on Netflix

Plot summary

Melanie arrives at Otto Leonhard High School as a new pupil, and Felix takes a shine to her. Ella and the rest of his gang are annoyed by this and blame Melanie for the small thefts that have troubled the school since she started. Felix has learned from Otto Leonhard how to shrink things, a trick meant to keep the magic objects safe. When his friends nearly spoil his date with Melanie, he shrinks them on the spot to a tenth of their size. Their class then sets off on a school trip.