Manager Hollie Walker said that while the biometric locks improved security at the nursery, the system also made access easier for carers and parents.
The new system, supplied by Newcastle-based UKB International Ltd, allows nursery personnel to register parents' fingerprints in seconds.
Parents then simply press their fingerprint on a sensor pad at the door to gain fast, easy entry to the nursery.
They can leave or collect their children without fuss while unregistered visitors must ring a bell and wait for a member of staff.
The new system also means a member of staff is not needed to answer the door, but can concentrate on supervising the children, maintaining staff-child room ratios.
The biometric scanner identifies key points on the user's fingerprint. No actual fingerprint is stored since the scan is converted into data which is then encrypted and retained for future comparison. The encrypted data is only held by the nursery making it fully data compliant.
Mrs Walker said: "Our new biometric access system means greater security for children and staff, which is a paramount concern to us.
"Fingerprint entry means only registered parents and staff can access the nursery and they can do so easily without having to wait for a staff member to answer the door.
"If we had installed a swipe card security system, people could easily forget or lose their cards, and we would be concerned the cards could fall into the wrong hands.
"Now we can be certain that only people registered on our biometric system can gain entry to the nursery"
Lucker Nature Kindergarten holds a 'Good' Ofsted report in all areas of their childcare and education. Another Ofsted report praised the biometric entry system as 'protecting children from harm'.
Located in the original old village school, Lucker Nature Kindergarten provides child care for 15 children between the ages of 12 months and five years.
In addition to a secure, homely atmosphere, Lucker Nature Kindergarten offers a unique 'magic woods' natural learning environment.
The nursery also offers a holiday club for children up to eight.
It was established in 1998, by Lorraine Pattison whose daughter Hollie manages the nursery. Hollie's sister, Katie, is deputy manager.
Both are qualified nursery nurses, while Hollie holds an additional qualification in playwork, and is working towards her Early Years Professional Status and Katie has additional qualifications in health and social care and special educational needs.
UKB International, regional support manager, Craig White, said: "Security is of paramount concern at Lucker Nature Kindergarten and the management has specified the only key which cannot be lost, stolen, forged or hacked – the human fingerprint.
"Now staff, management and parents are comforted knowing only authorised persons can gain access."