• Dear Parents, we are currently updating our website. Online purchase will be available from 21 Nov 2022. 
  • For enquiries, please contact us at hb.bk.ctr@gmail.com



Learn the Science behind the Power! ENVIRO BATTERY USES natural materials like mud, lemons and water to power a light bulb, a watch and activate a music chip. An amazing environmentally friendly science kit that includes detailed instruction so you can create many unusual batteries with fruit juices, vegetables, coins, utensils and more.