A campaign's been launched to try to uncover some of the most unusual collections in the UK.
An insurance company is behind the mission and it wants to find the five weirdest collections.
So it got us thinking, what do you collect that's clogging up your bedroom (and maybe the rest of the house too!)?
Are you always on the search for bookmarks or teddy bears, or are nail clippings and the autographs of Newsround presenters more your sort of thing?
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"When I was younger I used to collect barbies and I had like 40. I used to change their clothes everyday and I still have them in a box in the attic!!"
Jess, 14, West Sussex, England
"I collect model giraffes because they are my favourite animals. I have about 25 so far. I also collect gemstones and I have about 20. My friend collects teddy bears and she has LOADS!!!"
Charlotte, 11, England
"I collect teddy bears (223) and earplugs (649)."
Ruby, 9, London, England
"I collect lots of things - stamps, old coins, books, and I also keep a scrapbook!"
Sarah, 15, Bolton, England
"I collect marbles and I have got about 215 marbles."
William, 9, Hull, England
"I collect rubbers, Jacqueline Wilson books and keyrings!"
Alex, 10, Basingstoke, England
"I collect teddies because they are different sizes and they're so cute!! I also collect marbles, special paper and loads more!"
Ara, 10, Edinburgh, Scotland
"I collect scarves. I just started so it's quite small, about seven."
Lily, 10, London, England
"I collect salt packets I have 150 so far mostly."
Sarah, 11, Dublin, Ireland
"I collect china mugs. I've got loads, about 45 so far. Some of them are from different countries and I've got one with my rabbit on it!!!"
Emily, 10, Cheltenham, England
"I collect teddies. I have about 32 of them now. They are big and small!"
Ava, 10, Nottingham, England
"I collect Crazy Bones Go Gos. I have at least 180 I think. I also collect Bouncy balls - any colour, size or make. I have about 48. I also collect elastic bands for some strange reason and I collect teddy bears (dogs, bears, cartoon plush toys). And Spongebob stuff."
"I collect postcards and special coins with cool patterns on, I've got about £25 pounds but I won't spend them!"
El, 12, Essex, England
"I collect musical boxes and at the moment have 10 in my room and loads in the loft."
Becca, 9, Kendall, England
"I collect whatever takes my fancy, but mostly minerals and gemstones. I have four-and-a-half boxes full!"
Laura, 13, Sheffield, England
"I collect stamps and I've got a book full. I've got ones from China, France and America."
Lucy, 8, Inverkip, Scotland
"I collect feather boas! I have 218, my room is covered in them. I have every colour imaginable, and lots of glittery ones too! I'm getting another five for my birthday next week. I started collecting them when I was nine."
Emylee, 12, Southampton, England
"Well, a couple of autumns ago me and my friend and her sister collected conkers, we got over 800! We then sold a few to raise more to charity (£22!) I also collect keyrings - I have more than 50 and plan to beat the world record of 41,814!"
Freya, 12, Maidstone, England
"I used to collect corks from wine bottles but I had to bin them when I moved house. I have lots of Crazy Bones too but everyone at my school calls them Go Gos and they got banned cos everyone was fighting over them. I also collect lots of magazines and stationary!! I had a MASSIVE Beano collection too and I have two bookcases of books which are all mine(!)"
Rachel, 11, Musselburgh, Scotland
"I collect Roald Dahl stuff and Premier League stuff."
Sean, 11, Amersham, England
"I collect my cinema tickets. I have a lot of them now."
Emma, 13, Fife, Scotland
"I collect football cards and at school we swap them. I've collected all of them and I also collect conkers. I've won so many matches, it's so much fun."
Luke, 9, Leicester, England
"I love collecting buttons to make bracelets."
Elisa, 12, Cardiff, Wales
"I collect bouncy balls, big and small and it may sound weird but I collect light bulbs too. I have more than 200 different kinds!!"
Jodie, 11, Benburb, Northern Ireland
"I collect rubber ducks. I have 21 now I love them."
Ami, 7, Nottingham, England
"I collect headbands and so far I have got 103 headbands!!!"
Yasmin, 11, Nottingham, England
"I collect SPL stickers for my book and collect SPL cards."
Sophie, 9, Glasgow, England
"Well, when I was six years old I started to collect bottle caps. I ended up with about two to three hundred of them but I stopped when I moved to boarding school. I might start to collect something else now."
Jason, 14, Watford, Switzerland
"I collect Crazy Bones. They are these little figures and I love them all and I have 26 already."
Chantelle, 12, Banbury, England
"I love to collect Crazy Bones and postcards!! I have more than 60 Crazy Bones now and they all have names!! I also have several amazing postcard collages!!"
Emeline, 13, Northampton, England
"I'm collecting stones and Tigger teddies. I already have 10."
Alice, 8, Stockbridge, England
"Since I was six I've been collecting china dogs! Now in my room I have 70 dogs and 55 more downstairs!!"
Georgia, 14, Crowborough, England
"I collect pug statues, big small, any colour. I have 20 now and hope to get many more!"
Hannah, 12, Durham, England
"I collect marbles, and sometimes stickers, everybody needs a hobby."
Sam, 12, Manchester, England
"I collect paperweights."
Emma, 11, Snodland, England
"I love collecting crystals and socks!!!"
Charlotte, 11, Dartford, England
"I collect, buttons, stones and bouncy balls. I also have lots of books!"
Nahida, 11, London, England
"This will sound so strange but I collect bottle tops. They are really cool, like the colours and the shapes!"
Bethany, 11, Darlington, England
"I collect books and sometimes stickers."
Hinna, 12, Woking, England
"Cuddly toy dogs and Mizz magazines and horse stuff."
Georgia, 10, Kent, England
"I love to collect magazines, whatever type of mag it is I'll read it!"
Georgia, 11, Cambridge, England
"I collect stickers for my album."
Lauren, 11, London
"I collect panda teddies!"
Georgi, 12, Bedfordshire, England
"I collect autographs! I've already collected 2!"
Zarghona, 9, Barnsley, England
"I collect receipts. My family always give them to me and I sort them. I have 19 massive plastic bags full of them and three boxes all around the house. I started collecting them when I was three, so I have over 2,000 so far. I am counting them next week and then if I have 3,000 or more, then I shall pour them all over my bedroom floor and have a good game, and then put them back again."
Isabel, 10, Neath, Wales
"I collect HSM 3 cards."
Isabelle, 8, West Bromwich, England
"I collect toy monkeys! I've got about 150 of them!"
Beth, 14, Gloucester, England
"I collect sea shells and I used to have hundreds of them, but I cannot find them."
Aimee, 11, Portaferry, Northern Ireland
"I mostly collect books because I enjoy reading - books take me into a world of my own."
Megan, 9, England
"I don't really collect much, but I like getting lots of new cook books because I really enjoy making new dishes!"
Reuben, 14, Kent, England
"I collect Doctor Who and Beano stuff!"
Laura, 12, Kilkenny, Ireland
"I'm planning to collect all the LEGO City toys."
Gareth, 10, Exeter, England
"I collect silk material from around the world."
Katie, 9, Pujaudran, France
"Would make-up count? If it does, then that's what I collect."
Courtney, 12, Bristol, England
"I collect Care Bears!!"
Marnie, 11, Wirral, England
"I collect Doctor Who DVDs and mags."
Kasib, 11, Bradford, England
"I collect clothes and donate them to charity."
Heather, 13, London, England
"I collect things with pigs, sheep, cows and dogs on them! I have some really random stuff... like a shower cap."
Grace, 12, Westmeath, Ireland
"I collect my medicine labels for some unusual reason."
Hussnain, 12, Birmingham, England
"I collect autographs from semi-famous people, like Dick and Dom and the guy who presents Coast!"
Callum, 14, Fife, Scotland
"I mostly collect SPL stickers for my SPL book."
Kieran, 8, Dundee, Scotland