I'm another voter for Shetlands in your circumstances, although the main breed I keep is Hebrideans.
Coloured Shetlands are rarer than the whites, and tend to be a bit more 'primitive' somehow. They are small, very cute, soft a cuddly

, small enough for a large child to handle, plenty of classes for them in local shows for an interest for the children, the males can be eaten with relish, are sometimes ready for slaughter at 7-9 months, but more likely 16 months. The fleece is an easy to spin type, but with plenty of interest in the coloureds - just spinning white fleece can pall after a couple of years. They tend to be hardy, good feet in the coloureds, good easy lambers and milkers.
I should emphasise two things: never keep your ram lambs entire (ie always castrate them in the first 7 days of life), if you are intending to keep them beyond a year, with children about.
If ultimately you don't like the breed, sheep are all tasty so you can put them in the freezer and try something else, so this doesn't need to be a breed for life..