Is it ok to let my 18 month old watch 2-3 minute cartoons a few times a week? Or is no digital viewing advised till they're 2?

It's really up to you :) Every parent has their own parenting style. For our 2.5 yo TV is part of his daily routine, together with mealtime, nap time, play time, story time and outdoor time etc. For us, everything in moderation. His little Brother is 1 and he usually Follows his brother's schedule. Personally I feel a couple of minutes don't really hurt and it gives you some time to breathe. It's when they start demanding TV time that's the problem..