Photoshop isn't the right tool for most of this - Illustrator is. I'll be honest, I don't really like your designs. They look a little bit 'thrown together' particularly the type - just looks like you couldn't be bothered and scribbled it on top in black marker pen.
Having said that, you don't mention what level you're at - are you doing GCSE, HND, a degree...?
I agree that the type is quite coarse and not particularly fun or appropriate. As the background graphics are quite flat and uninteresting, the type and logo should both leap out at you either by placing this information on a panel (like Heinz etc.) or by leaving space around them to focus the eye. At the moment you've resorted to effectively black marker over the illustrations to try and make this info stand out.
The fruit illustrations could be better used - perhaps making them smaller and repeated, again around the logo and description info.
Also, bear in mind the effect of a pack being filled and the effect on the legibility of the info on the edges of the pack. These often get lost, so repositioning these to the centre would be better.
I'm sure you've done your research and seen what's out there in the baby/infant food/drinks market, but if not a trip down to Boots would definitely help.
As a dad you say you are familiar with this market, try printing your graphics out at full size and placing them on a shelf next to similar products and see which shouts loudest (and then question why.)
Sorry for any confussion but the standard led me to think that you'd been using something like "paint" to do the work and as for the stroke it just looks nasty
Did your college ask you to conduct a study of the company before you started your design?
Did you think about who buys this stuff, and what influences their decision to buy? Did you think about the ways in which the current design isn't up to scratch, the age of the branding and the cultural changes that have forced their current branding out of date?
Graphic design is ALL about communication and your design fails to convey any messages that are relevant to new mothers today.
Spend a day studying Cow and Gate. Read Mumsnet and look at the politics of infant feeding. Spend a whole day doing that and then tell me if you're happy with your current designs. Seriously- what does a graffiti scrawl have to do with the nourishment of infants?
I know you're still at an early stage of your education and the criticism might sting, but if you learn to think critically about your visual communication now you'll have no problem scoring a job when you graduate.
Oh, and scrap the computer- work your ideas up in pencil and paper. Your lack of experience with the software is limiting your creativity.
Mercy : Design Agency and Literature & Arts Collective : London / Liverpool : UK