More: the sign illustrates a woeful trend in signalisation. (Another example in Denmark) Both adhere to the modern view about communication. Today's communication must be fluffy.
People can't stand a message loud and clear; they need a nice wrapper, some mollification, a smile. A bit like our food. Try to find a honest potato. Everything has been processed, improved, enlightened. While this approach surely makes it easier to swallow the dailly killings on our television screens, it is a bad idea for traffic signalisation.
Roadsigns must transmit an unequivocal message in a split-second. The older signs perform much better in this aspect.

Alain Guët's Manifesto of the Portuguese pedestrian (temporarily out of order) features some more examples of signs who perform well during presentations for the assembled press or neighbourhood but not on the road.

The first series shows two walking children. The design brings similar panels in several European countries to the mind (e.g. Spain). I wonder about the bulge on one of the boy's legs. Whether it's a sock or the fur collar of a boot, the question remains why the feature is absent from the other leg.

The boy switched his bookbag for a ruck-sack. We have seen this boy earlier! (Find him in Giumri - Armenia.)

Look at the girl.
She is wearing the same hairstyle as her compeer in Denmark. She didn't grew up like the boy. He grew taller into a more adult stature while the girl became more childish.

It's apparent, looking at our samples, that Bulgaria has quite some difficulties in keeping to quality standards. Sloppy work abounds and the poor kids are rapidly becoming weird creatures with spikes and impossible body parts (see Filipovo find). But still, I prefer this poor drawing above the flat iconized versions of most countries.