Dizzy is an orange tilting-drum concrete mixer. Dizzy is portrayed as one of the youngest vehicles in Bob's building yard. She is eager, curious, and easily excitable.
Dizzy is a smart, witty, and eager concrete mixer. She can be a bit of a know-it-all, spinning her mouth as fast as her drum. This sometimes leads to mix-ups, but her energy and enthusiasm make her an integral part of the team.
Dizzy is energetic, curious, cheerful, and a bit of a know-it-all, like Roley she seems to enjoy music but only listens to music. In the original series, she has the ability to stand on her rear tires similar to how dogs can stand on their hind legs. She does have a soft spot for friends and she is always ready to lend a helping hand.
Dizzy is a small, orange tilting-drum concrete mixer. She has an orange mouth and big, round eyes, and small tires, which she is able to clap while happy. She also has a black stripe across her mixer drum.
- Season 1 Scoop Saves the Day ( debut), Bob Saves the Hedgehogs, Pilchard in a Pickle, Muck Gets Stuck, Wendy's Busy Day, Bob's Bugle, Buffalo Bob, Travis Paints The Town, Travis and Scoop's Race Day, Bob's Birthday, Naughty Spud, Scary Spud and Bob's Barnraising
- Season 2 Spud The Spanner, Wallpaper Wendy, Runaway Roley, Bob's Big Surprise, Dizzy's Statues, Lofty to the Rescue, Wendy's Big Match, Tea Set Travis, Dizzy's Birdwatch, Clocktower Bob, Pilchard Goes Fishing, Wendy's Tennis Court and Bob's White Christmas
- Season 3 Bob's Boots, Mucky Muck, Bob's Day Off, Magnetic Lofty, Roley's Tortoise, Special Delivery Spud, Pilchard's Breakfast, Scoop's In Charge, Scoop Has Some Fun, Dizzy's Crazy Paving, Spud and Squawk and Trailer Travis
- Season 4 Roley and the Rock Star, Scoop's Stegosaurus, Sneezing Scoop, Roley's Animal Rescue, Scarecrow Dizzy, One Shot Wendy, Spud Lends A Hand, Bob and the Bandstand, Farmer Pickles' Pigpen, Bob on the Run, Forget-Me-Knot Bob, Scruffty The Detective and Watercolor Wendy
- Season 5 Scruffty's Big Dig, Inspector Spud, Cock-A-Doodle Spud, Wendy's Surprise Party, Skateboard Spud, Muck's Monster, Spud the Dragon, Pilchard Steals the Show, Bob's Hide, Bob's Auntie, Bob and the Big Freeze, Clumsy Roley and Eskimo Bob
- Season 6 Bob's Pizza, Bob's Metal Detector, Mr. Beasley's DIY Diaster, Wendy's Removal Service, Lofty and the Rabbits, Lofty and the Giant Carrot, Bob's Egg and Spoon Race, Trix's Tiles, Mr. Sabatini's Smashing Day, Roley to the Rescue, Spud's Big Splash, Spud the Musketeer and Wendy's Magic Birthday
- Season 7 Mr. Beasley's New Friends, Spud the Pilot, Trix and the Otters ( cameo), Speedy Skip ( cameo), Bob and the Badgers, Bob and the Goalie, Dizzy Goes Camping, Pilchard's Pets, Snowman Scoop, Lofty's Long Load, and Dizzy the Sheepdog
- Season 8 Bob the Photographer, Mr. Bentley's Trains, Wendy's Big Night Out, Racing Muck, Mr. Beasley's Noisy Pipes, Lofty's Jungle Fun, Ballroom Bob, Molly's Fashion Show, Spud and the Doves, First Aid Molly, Mr. Bentley: Dog Sitter, Travis Gets Lucky and Scruffty On Guard
- Season 9 Bob the Farmer, Mr. Bentley's Winter Fair, Lofty the Artist, Spud's Statue, Pilchard and the Field Mice, Trix's Pumpkin Pie, Travis' Busy Day ( cameo), Muck's Surprise, Skip's Big Idea, Roley's Important Job, Trix and the Bug and Scoop the Disco Digger
- Season 10 Bob's Fresh Start, Lofty's Shelter, Dizzy and the Talkie Talkie, Scoop's Recruit, Where's Robert?, Wendy's Welcome, Roley's New Friend, Two Scoops, Benny's Back!, Spud's Straw Surprise, Off-Road Scrambler, Meet Marjorie, Muck's Mud Hut and Wendy's Party Plan
- Season 11 Benny's Important Job, Put-It-Together Spud, Roley's Round-Up, Dizzy the Detective, Two-Jobs Travis, Scrambler and the Colorful Cave, Spud's Bumper Harvest, Muck's Convoy, While Bob's Away, Robert Will Play, Bob's Three Jobs and Scoop Knows It All
- Season 12 Dizzy's Sleepover, Lofty the Star, Slow Down Scrambler!, Travis and the Tropical Fruit, Scoop the Teacher, Sir Muck, Bashing Crashing Benny, Spud's Cork Tree, Bob's Top Team, Sumsy and the Beast, Listen with Scrambler, Roley's Bird's Eye View, Wendy's Houseboat and Roley's Moleys
- Season 13 Dizzy the Walking Bus
Season 14 - Season 15 The House That Lofty Built, Bob's Big Idea, Roley Brings the House Down, Muck's Machine Wash, Fantastic Flex, Clean As A Whistle Bristle
- Season 16 Silent Scoop, Super Splasher, An Inspector Calls
Season 1 - Scratch's Hidden Treasures, Scrambler's Best Idea, Scoop the Artist, High Tide For Lofty, Start from Scratch, Night Time Scratch, Lofty and the Monster, Lofty's Helpful Day, Dizzy In Charge, Scoop's Sea Rescue, Scratch's Star Turn, Pineapple Scratch, Scrambler's Stage Surprise, Wendy's Birthday Surprise, Scratch Goes Solo, Dizzy and the Wheelies, Muck's Beach Tower, Here Comes Muck, Scrambler Gets Clean, Whizzy Dizzy, Travis' New Garage, Scratch and the Dream Room, Stage Struck Dizzy, Roley and the Fox, Super Scrambler, Roley's Weather Rap and Bob's Big Bounce
Dizzy is able to use her wheels like hands or feet in the original series.
She had a walkman which was later removed in Project: Build It, though it reappeared in When Bob Became A Builder.
Dizzy's original movement sound is a simple squeaking sound effect.
Dizzy can also use her wheels to pick things up and throw them, as shown in Mucky Muck.
Dizzy was the youngest machine in the original series before Trix was introduced.
Dizzy is the only machine character to appear in every episode in the second season of Ready, Steady, Build!.
Dizzy is female in all versions expect for the romaine version in which Dizzy is male.
It is unknown if she and Scratch are siblings.