A wildlife trust is appealing for donations to replace decaying classrooms nestled in the woods.
Children learn about nature at the more than 30-year-old centre in the heart of Nower Wood, which has stunning bluebells, badgers and great crested newts.
But only one of the classrooms is heated and the toilets regularly freeze during winter forcing the Surrey Wildlife Trust to cancel events.
Hayden Turner, education centres manager, said: "A new field centre at Nower Wood is an investment in our children’s future.
"It gives young people, most of whom don’t get the opportunity to experience the natural world close-up, the chance to find out how truly amazing and fascinating the nature on their doorstep is.
"Those first experiences in wild places as children stay with us forever.
"Your support can help us obtain this new building for this magical place and continue giving these life changing experiences."
The new eco-friendly building will be heated by recycled wood pellets and use rainwater to flush the toilets. The rebuilding project costs £450,000.
The trust has already received about £35,000 in gifts-in-kind and is hoping to raise a further £60,000 from an appeal to start the first phase.
For further information and to make a donation, please visit www.surreywildlifetrust.org.