Youngsters at the BMX track at Porth in Rhondda Cynon Taf said it has given them "something to do" - and is "great fun."
The initiative has been picked out as one of the best in Europe for crime prevention.
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Those watching Euro 2016 games in Wales have seen alcohol marketing almost once a minute during play, according to new research.
Williams has had scans after he suffered a shoulder injury against Northern Ireland.
Chris Bryant was speaking on ITV's Good Morning Britain following his resignation as Shadow Leader of the House of Commons.