My son refuses to eat his stage 3 baby food, what should I give him?

My son refuses to eat his baby food. All he will accept is gerber graduate cheese puffs, parents choice cheese corn puffs, wagon wheels, & dehydrated yogurt melts. He only wants tiny little finger food & I want to be sure he's eating enough. He seems to only want things that crunch & I'm trying to give him new variety but I want to make sure he's getting enough nutrients. Has anyone else had this problem? My sister has a 2 year old & keeps re-uring me it's completely normal.