Scores of excited youngsters queued up from as early as 7am on Saturday to secure their places on the summer's Timbertown activity camp.
The enrolment morning, which started at 9am, was held at Newlands Girls' School in Farm Road and was also a chance for adults to volunteer.
The unique event will see 300 children build a miniature village made from donated scrap timber on Maidenhead Town Moor from Saturday, August 24 to Tuesday August 27.
This year's theme, in celebration of Timbertown's 30th anniversary, is 'the world is your oyster.'
A four-day extravaganza of painting, sawing and games will lead to a spectacular bonfire finale where the village is then burnt to the ground.
With 50 spaces still remaining, organisers will be holding a second enrolment this Saturday at Maidenhead Sailing Club in Summerleaze Road from 9am.
This will be on a first come first served basis.
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The Met Office has issued a yellow alert for Windsor and Maidenhead, Slough and Wokingham, warning that rain moving eastwards across the south of the country may turn to snow in some places.