Disclaimer: I'm not being an asshole.. just being honest
In general there are weird mixes of white balance across all photos. Look at the skin tones to see where you went wrong.. blue, orange, grey. I can see the "look" you were going for but you should get the colours consistent.
Loads of tilted horizons.. not sure if it's on purpose or just careless. But I can't see why they'd be on purpose. It's not stylish at all.
Think of it this way- every photo should SAY something. The relationship between mother and kid, doing some of their favourite activities, in a place which means something to them etc...
1 - what are they doing with the stick exactly?? We can't see the end of the stick? Is it supposed to be fishing or something?
2 - ok but tilted horizon
3 - Tilted horizon like whoa
4 - Tilted horizon.. you get the idea. It's in almost every photo. This photo is actually ok but you could have composed it better without the slide etc on the right overlapping with the mum. Maybe you can crop it to help a bit
5 and 6 are pointless and unflattering photos. I just can't understand why you uploaded them
7 - Again, fairly pointless. Hair covering the face. Also, why is it black and white? It's not a strong image with interesting shape/texture etc, so why should it be black and white? It seems like you just made it B&W for no reason.
8 - Pretty good, although the sky is blown. You could have used fill flash
9 - Fine
10 - Fine, but fairly pointless B&W again and it's almost the same photo as 9. There's so much cool stuff you could have done at this setting. Put camera on a tripod and have the kid walk along, then take photos at each stage. Then layer in photoshop and delete areas so the kid is walking along the thing multiple times. That would look really cool!
11 & 12 - Yup they're fine and show nice expressions of them having fun
13 - Pretty good
14 - Could have been composed better so you can see her face
15 - Good, and you can make it better in PP but dodging their faces and burning some of the surrounding to make them stand out better
16 - Fine, and the tilted horizon actually works in this one
17 - Fairly meh.. her jacket is half on, holding her phone, looks distracted etc. And you can't see the kids face at all. Also, why the sepia/aged tone? It lends nothing.
18 - tilted horizon dammit