Pattern needed for toddler jumper/cardigan

Ive got 4 balls of 400g So Crafty Super Soft CHENILLE Yarn Baby Super Bulky from Aldi and wanted to knit (or crochet) my 2.5 year old granddaughter a chunky cardigan or jumper. What pattern would work with this type of wool - I’m a relative novice but can do the basics.

Welcome to KH!
Have you looked at Ravelry? Here’s the results of a search for either knit or crochet sweaters with super bulky yarn. Something simple would be best, no intricate stitch work which would only be lost in the chenille yarn.
https://www.ravelry.com/patterns/search#craft=knitting|crochet&pc=sweater&fit=baby&weight=super-bulky&sort=best&view=captioned_thumbs

You can further refine the search if you want to look at free patterns or those for older children or either knit or crochet.
It sounds like 4 x 400gms is plenty of yarn. The Aldi Chenille is about 104yds/100gm.
https://www.ravelry.com/yarns/library/aldi---hofer-so-crafty-baby