ISESteroids has a "Variable Monitor" feature that sounds like what you're looking for. The module isn't free, but I've been very happy with the investment since I write PowerShell code for a living. It has a huge set of features to turn the ISE into a much more professional development environment.
Thanks guys. GJ I've seen all the links before but somehow I missed the functionality of ISE where it shows you the value when you hover your mouse over a variable. I'm just a beginner so ISESteroides would probably be an overkill at this stage but thanks for mentioning it.