There won't be as much to do in the fox valley as there is in DC but that being said it's not dullsville either.
I recently moved to Florida (My husband's dream) but we both grew up in Appleton. We started our family there and it is a great place to raise children. The schools are wonderful and even though the winters are long there's generally a lot to do. (Skiing, snow mobiling, my husband loved the ice race on the frozen lake with the auto club) Housing is afforable and the cost of living is relatively low. The lake is very busy year round. I would't worry about raising your kiddos there. Just keep an eye on them and teach them to swim
Town of Neenah taxes will be much lower than city of neenah taxes. I hope you enjoy!