I was with the missus at the Hounslow Space Waye recycling center on Saturday. Filty, mucky, and smelly - but she is good with the kids.
Actually been there many times but on that day they were landing on 27L - amazing sights.
If you make your way to the sort of Industrial park around that area there must be some good spots to get them landing or taking off, depending on the runway in use. Plus there is a cafe on the site.