The black sheep brewery, which has a great cafe. If you can make the drive and want an impressive walk, go on the backroad down to Lofthouse village and then up to Scar House Reservoir
Its a set of connected dams and reservoirs up the valley that no-one lives above. Spectacular desolate scenery - you can do a round reservoir walk (about 6 miles irc) or add on Gowthwaite for a longer one. Really interesting history as they compulsory purchased the houses and floods the valley to make it
One side of Scar reservoir is tarmaced so easy for push chairs etc, the other isn't.
Just up the road from Scar and Lofthouse is this place (haven't been, local reviews are good) they have a fairy trail, lots of outdoor stuff and you can pre order picnics etc studfoldtrails.co.uk
Weatherheads in Pately Bridge on the way back for pork pies, and they have a decentish park for the kids
Ripon isn't far and you can see the cathedral (altho you'll get pressured to make a 'donation') and old stuff, fountains abbey is great for a day out too - really nice forest type park for the kids and decent tearoom and its mostly paved for pushchairs etc
Swinton Park is excellent too - we stayed for a 50th wedding anniversary but they have lovely grounds (and a glamping site!) and a brasserie and spa