Whether it's the walls, your new laminated floors or even their brothers and sisters - kids will draw on anything. But imagine this mum's horror when she found her 5-year-old daughter had scribbled in pen on her brand new £320 Michael Kors handbag?!
"I'd only bought my bag the week before after eyeing it up for a while," Sajda Shah from Chigwell, Essex, said. "I had been putting money away so that I could treat myself, so I was really pleased when I finally got it."
"I'd used it a couple of times for work when I looked at the bag one night after the kids were in bed and noticed the writing.
"I was furious and upset, I couldn't believe she'd actually ruined my bag.
"I almost got Amber out of bed but I got myself together and thought I can't do that. And then I had to really think how to discipline her."
Little Amber had watched her mum Sajda diligently write her name in all her school clothes - so she thought she was being helpful…
"She admitted she had done it and said she had written my name because she didn't want anyone to take it," the mum-of-4 said. "My heart melted because I knew she was doing the right thing, we have to put her name in all her school things, how could I tell her off then?
"I just had to explain to her that she shouldn't write on Mummy's things and that what she had done wasn't right."
Sajda and her husband, police officer Tahawar, have four daughters - Arooj, 6, Amber, 5, Ayla, 2, and 5-month-old Anshrah.
"I knew it was Amber," said Sajda. "She's done this kind of thing before.
"She's been told off for writing on the walls and the bedsheets and the sofa. But she is constantly writing. She's always making up stories and writing them down."
But luckily, Sajda searched the internet and found a handbag repair company, Handbag Spa, that cleaned the bag for £80.
She said: "We've had the sofa repaired when Amber had written on it before so I knew it could be cleaned up. I just had to find someone to do it."
Freya Bass, manager of the luxury Handbag Spa in Harrogate, North Yorkshire, said: "We've seen some of the world's most luxurious designer handbags come to us in some terrible states, but this one just made us laugh out loud.
"Usually biro stains are accidental strokes of a pen, this is the first time we've seen a whole name copied so neatly on such a beautiful bag.
"We've easily been able to remove all the ink and get the bag back to perfect condition. You'd never even know a little person had been practising their handwriting on it."
What's the worst damage your little one has done with pen or crayons? Let us know in the comments below.
Photos: SWNS
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