Just trying out ideas
Frankly this is by far my most favourite lesson. I realised I actually had an eye for mixing the colours because towards the end of the lesson I find myself mixing paints for not just myself, but for my friends as well.
My only issue was to bring the in the details in paint. It was very hard to put all the tiny details because a small mistake could mean redoing the the entire portion again. It was still great experience, and I hope I get to do this again in the near future!
We had to make story out of lemons and deers, and being the eccentric people we are, we came up with deers eating lemons and pooping lemon tarts. 
I personally worked on the above piece. I think the hardest part of it was the get the right shade of the paint. I usually started with the lightest shades then start adding darker colors when i needed a darker shade, but the problem with this was that if i wanted to touch up any of the lighter shades I will have trouble mixing the paints to the exact shade and color I need. But on the whole it was a very fun experience just playing around with the paints.