Sure, I make them all the time. Well, all the time during May-Sept, anyway. I do any sort of fruit juice or make up a jug of blackcurrant/raspberry/orange/etc squash (syrup) and freeze that.

Sometimes I do stripy ones - pour OJ half way up mould, freeze, pour blackcurrant squash on the remaining half, freeze. Or add fruit - fill mould with raspberries, then pour peach juice over. Chunks of banana in chocolate milkshake is good, too

My kids are largely in charge of dictating the recipes, and so far all variations have been at least edible.

kodokan