Our Story

Playground-Energy-LUMI 1

In 2012 Playground Energy Ltd invented the ‘Lumi’ Spring. The product first appeared at the Eleven expo in Sofia, Bulgaria. As a result of that Playground Energy was invited to attend a Springboard course in Cambridge, UK and to be part of the Smart city project, Milton Keynes (UK) with partner Open University. This brought the attention of The Guardian, Wall Street Journal and Reuters, which had an enormous value for a start-up company like Playground Energy on the global market. We were selected to be part of a major project sponsored by EVN (the biggest electricity supplier in Bulgaria). As part of this project, they had to install our Lumi in three Bulgarian towns. Playground Energy products have been in use for two and a half years and we have no customer complains. We’ve received a very positive feedback, the kids just love our Lumi!

In 2013 we won a very prestigious contest, the National Contest Innovative Enterprise of the Year 2013 Area “Innovative start-up enterprise”, where the President of Bulgaria presented us with the award. Since then the Playground Energy sales market grew exponentially – Europe, England, USA, Australia, South America and Africa.

In 2015 we were selected to be part of a $15 million project, the new Children’s Science Museum in Sofia, Bulgaria. The museum is the first children’s museum in Bulgaria and the largest in Eastern Europe. We have a permanent exhibition at the Museum and our latest product Lumi Springs & Fountains was installed at the playground. This project serves as a great display of our products and continues to bring new clients, but in the same time is great educational tool for kids of all ages.

In June 2015, NGR Innovative Solutions P/L became the exclusive distributor of Playground Energy for Asia and Asia Pacific. Since then seven new products have been developed. The Playground Energy OEM ‘seat’ had been used in playground equipment by Australian companies such as BigFish Workshop P/L and Rhinoplay P/L. Playground Energy Australia exhibited at CeBit Australia where there was great interest in our equipment.

Meet the Playground Energy founders


Ilian Milinov

Industrial Designer
Honors and Awards
RED DOT design award 2015
RED DOT design award 2012
RED DOT design award 2010
BEST of NEOCON 2004 Chicago
GRAND PRIZE building innovations award 2004 Chicago
CHAIR OF THE YEAR 2002 Udine Italy
TOP TEN 2002 Udine Italy

 Ilian Milinov_Red Dot Award

Hristo Alexiev

The Innovative doer

Co-founder of six companies, including Playground Energy Ltd
and Walltopia – one of the largest producers of artificial climbing walls in the world


 Hristo Alexiev Playground Energy