This is an easy pullover pattern written in 4 sizes for kids, worked using medium worsted weight/category 4 yarn and 6 mm crochet hook

2-4 years
370 meters of yarn
finished circumference - 62 cm/24.5 inches
height - 36 cm/14 inches

4-6 years
510 meters of yarn
finished circumference - 68.5 cm/27 inches
height - 39 cm/15.35 inches

8-10 years
620 meters of yarn
finished circumference - 71 cm/28 inches
height - 45.75 cm/18 inches

10-12 years
745 meters of yarn
finished circumference - 78 cm/30.7 inches
height - 48.25 cm/19 inches

Video tutorial is available in my YouTube channel
https://youtu.be/d6fnN_KxaNU?si=xu2YfaR-PGhMw2nU