A crafty seven-year-old racked up a huge £500 bill on a mobile phone game after she memorising her mum's PayPal password.
Amanda Conway, 46, and husband Paul Conway, 46, took daughter Elizabeth and the rest of the family to the Isle of Wight festival.
While the family were watching the bands, the schoolgirl played a game on the device, downloading a house building game called Roblox.
But when the family returned home, mum-of-two Amanda checked her American Express account and discovered she had £500 worth of charges.
Elizabeth confessed she'd memorised her mum's PayPal password after watching her make online purchases and had gone on a spending spree.
The girl, now nine, had bought loads of Roblox extras without realising how much of her mum's money she was spending.
Amanda, a financial manager from Brighton, East Sussex said: "When we realised what she'd done we were livid.
"She must have watched me put my password in a few times and then helped herself to all sorts of Roblox extras at our expense!
"Paul gave her a monumental telling off which I don't think she was expecting. He's usually the chilled one so seeing him that angry was a huge shock to her.
"We had lots of tears and lots of apologising to which I replied 'that's not going to pay the credit card bill though is it Elizabeth!'
"Now some time has passed it's definitely something we look back on as a family and can joke about - she's a lovely girl and I know she's learnt her lesson."
She racked up the charges during the festival in June 2019.
But that £500 bill is a drop in the ocean compared to what another set of parents had to pay out.
George Johnson, 6, from Wilton, Connecticut, spent $16,293 (around £13,000) in Apple app-store on his favourite video game Sonic Forces.
His mum Jessica likened the boy's behaviour to a drug addict - and called the games 'predatory'.
"It’s like my 6-year-old was doing lines of cocaine, and doing bigger and bigger hits," she said.
"These games are designed to be completely predatory and get kids to buy things, What grown-up would spend $100 on a chest of virtual gold coins?"