David, Paul, Roy et al.,
I was at Camping Lelefeld last week for my 'van service at F-J's. Friendly Herr Blut put me opposite reception, but I don't recall any kiddies play facilities, although it is right by a wood.
North of Elmpt (Camping Lelefeld) and North of the road from Bruggen to Swalmen, in Holland, is a large, enclosed Naturepark, surrounded by a high fence with large turnstile type gates to allow bikes through. There are loads of trails inside the park many tarmaced for bike-riding.
Last year I visited, just for a look-see, a very large Dutch site S. of Roermond, at Herkenbosch, called Elfenmeer Rekriatiepark; see
http://www.elfenmeer.nl/. But it's in Dutch, or even double dutch!
It has loads of facilities for little (and big) kids; swimming pools, games rooms, swings etc. and looked a very neat site within a wooded area. Very large garden centre just down the road.
It's not that far (~20min) west of Lelefeld, just over the border.
BTW turns out I had a leaking shock absorber which needed replacing; naughty Mr. BPW. 50€ for a s/h one. 110€ new!!!