This is not the sort of warning you see every day. The novelty of the message caught my attention and tickled my funny bone, but the same words printed more formally in, say, Franklin Gothic or Times New Roman, would change the tone completely. Handwritten in chalk, framed with uneven knocked together old timber, and the serious message that parents need to watch their kids in the play area is delivered in exceedingly good spirit. The message is not the full picture though: the choice of blackboard and frame is obviously well thought out to fit in with a design aesthetic, as is the placement on the background of scarred and scrawled-on brickwork which has been left in its original state.