I can guarantee you that yes, he will try to eat it. But I suspect he will also probably try to spit it out right away, too! DS still insists on dipping his dummy in it but as soon as he puts the dummy in his mouth he spits and tries to get it all out ... and then does it again

I say it's not really a problem - maybe use vinegar instead of alcohol I guess. Or don't dye it. I only dyed a small bit of it trying it out, and DS has been so happy to play with it at all let alone if it was dyed. He even loved it when it was just plain white rice, but adding tiny pastas in and then red, orange and green lentils has made it all colourful enough as well! If you put down a dark coloured sheet then he can see it better but the sheet I use is white and he still loves it!