• Dear parents, online purchase has started. It will end on 22 December 2022. 
  • For returning parents, please be reminded go to account details to update your child’s level and class to ensure that the right books are displayed.
  • 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.