A forest school area at Swaffham Infant and Nursery School has been vandalised for the fourth time since last September.
The White Cross Road school had been targeted by vandals, for the second and third times, over the Easter holidays.
Cara Butters, a higher level teaching assistant and forest school leader at the school, said: 'Sadly, we were again targeted over the weekend of April 27/8. The willow tunnel received further damage, a three to four metre tree was forced down and some holes dug. But we will not be beaten.'
They have set up a just giving crowdfunding page to raise money to repair the damage.
On the first occasion the school was targeted, items were damaged and stolen.
And then over Easter, the swing was ripped down and broken and the wooden see-saw was split in half, among other acts of vandalism.
Norfolk police are investigating.
For more information, visit www.justgiving.com/crowdfunding/heartwoodforestschoolswaffham
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