I agree with Fleecewife - Shetlands sound like a really good choice !
I am thinking of getting my first flock of Shetlands and I am a tad bit older than 2, but still a big kid at heart!! So I wanted my first sheep to be easy to handle, come to the bucket, easy lambers and they are very hardy (if they can survive Shetland's weather!) they can put up with our Scottish Borders weather! Oh yes, their meat is supposed to be lean with a fine texture even tough you have a smaller carcass.
Luckily, the Secretary of the Shetland Sheep Society, Denise Playfair, only lives up the road from us at Stichill in Kelso . I met her at the Border Union Show and she really loves her Shetlands and she won lots of rosettes!! She really sold the breed to me as I was also considering Ryelands and Jacobs - discounted those now for my first flock. She welcomes folk to phone her and she said that I could arrange to go up to her small holding as she has lambs and ewes for sale. I'm sure she won't mind me saying that as she is a really helpful lady!
You have a lucky little boy - wish I had started my smallholding years ago!!
Interesting to hear other recommendations