Isn't it amazing what one can find on YouTube?
This appears to be the full and original "Play Safe" presentation made for British children in the 1970s, running for about 10 minutes:http://www.youtube.com/watch?v=uZ7eAAtz8jE
I don't remember ever seeing this entire production before, but three of the segments from this (the fishing/camping accident, flying kites, and the frisbee) were shown regularly as separate 60-second Public Information Films on TV (each one ending with the "Play Safe" caption under an arc). I've posted the Frisbee one before, but this is the first time I've seen the others in years.
Camping & fishing:http://www.youtube.com/watch?v=mHq767Fl26E
Kites & planes:http://www.youtube.com/watch?v=uT_wwkCoBL8&NR=1
Frisbee (very slight cuts in this TV slot from the original, which I never realized before, not knowing that this had been taken from part of a longer presentation):http://www.youtube.com/watch?v=TCg1sVGfTkA