A train-mad six-year-old used all his pocket money to help save his favourite steam railway.
It comes after a 20-week closure due to the pandemic. The railway's reopening coincided with its 60th anniversary.
Alex, from Petworth, also wore a conductor's cap and waved the green flag.
He had donated all his pocket money after reading about a fundraising drive by the heritage railway, which has been used as a backdrop in period dramas such as Downton Abbey and Poirot.
Delighted Alex was given a VIP tour of the railway's locomotive workshop and exhibitions before taking a ride on the line with his mother, Sophie.
She said: "He read about the appeal in the railway's newsletter and said 'Can I give the money from my money box?'.
"I said 'Are you sure you want to?', because he had been saving up for a new coach for his train set, but he insisted he wanted to help.
She then topped up Alex's £6.10 to £20, adding to the more than £360,000 donated to keep the not-for-profit, largely volunteer-run line open.
Bluebell Railway funding organiser Trevor Swainson said: "We were touched that Alex had emptied his money box because he loves trains so much and particularly his concern that the railway might struggle as it comes out of lockdown.
"We have had more than 2,500 donations to the appeal but it is stories like Alex's that are particularly heart-warming and it makes us realise just how special the Bluebell Railway is to so many people."
Opened on August 7 1960, the Bluebell was the first heritage line of its kind in the UK, and is made up of 11 miles of track running from Sheffield Park in East Sussex to East Grinstead in West Sussex.
Its four stations, which have original working signal boxes, preserve different periods in history including the Victorian era, the 1930s and 1950s.
Its supporters include Blackadder star and TV presenter Sir Tony Robinson and actor Martin Clunes.