The AONB (Area of Outstanding Natural Beauty) Office have a really detailed description of a longer walk of about 7 miles, ideal to do with older children.
“This enjoyable trail around part of Dallowgill is illuminated with 22 mosaics depicting local scenes and flora and fauna which might be encountered along the route. The trail was created as part of a community project to celebrate the designation of Nidderdale as an Area of Outstanding Natural Beauty.”
You can find printable sheet written by the AONB office that you can take with you to guide the way. Worth doing this at the end of the summer when the colour of the heather is stunning!
http://www.nidderdaleaonb.org.uk/ckfinder/userfiles/files/Walks/CrackpotsMosaicTrail_web.pdf