http://www.harborfreight.com/165x-jewelers-clip-on-eye-loupe-94364.html get some magnification and find out.. spider mites are smaller then a grain of salt or pepper and tough to see with the naked eye Try tapping the plant over a sheet of white paper.. adult mites will look like tiny moving specks red or black
Get a maginifying glass or scope and check the undersides of the leaves, youll see them moving around ,little orange and black dots. Your plants looks to be getting big, id say transplant them out of those pots to bigger ones soon as well.
I do see what could be mild pest damage on that 5th picture. It wouldn't hurt to spray neem a couple of times to be safe. It also helps prevent powdery mildew so it's good stuff to have around. It looks like you might have more than one problem though. The soil looks pretty wet and they are a little yellow from the pics. Yellowing at this young tells me it could be a number of things. Overwatering, not enough light. Low temps. PH issues. I would do the neem and let them dry out a bit before watering and see if that helps. The first few years of growing is all about the trouble shooting. You'll get the hang of it.
The plants look fine and healthy overall, the pictures close up do show some insect damage, bigger than spider mites and not a serious infestation but something to keep an eye on. Growing outdoors you will always have some insects on your plants and a little chewing on them is normal. If you start to see a lot of it, further steps would be needed of course.