Roughly how much spending money do I need for DisneyLand Paris?

[Juno321]

This will include lunch and evening meal each day, and a few souvenirs etc...for one adult and one DC.

How much roughly do I need each day we're there??

if you're eating in the parks / at the Disney restaurants, I'd say at least e100 / day (25 for lunch / 50 for dinner / 25 for a snack or drink plus a souvenir). That's pretty modest I think based on their prices, however much it sounds - though remember your euros will be cheap to buy now