123 Sesame Street

Notable parts

• 5 moulds appear in no other set: Minifig Head Special (Bert); Minifig Head Special (Cookie Monster); Minifig Head Special (Elmo); Minifig Head Special (Ernie); Minifig Head Special, Big Bird.
• 4 parts come in a colour no other set has for that mould: Animal, Dinosaur, Raptor, Baby [PLAIN] (Olive Green); Lamp Post 2 x 2 x 7 with 4 Base Flutes (Green); Minifig Head Special, Cube [Plain] (White); Torso with Bird Wings [Plain] (Yellow).
• 5 printed parts are only in this set: Brick 1 x 2 without Bottom Tube with Gold '123' print (Trans-Clear); Brick Round 2 x 2 Sphere with Stud with Face, Large Eyebrows print (Oscar the… (Lime); Tile 1 x 1 Half Circle with Green Field, White '123' print (Yellow); Tile 1 x 1 Heart with Worm (Slimey) print (Orange); Tile 1 x 4 with Green Field, White 'Sesame Street' print (Yellow).
• 19 parts appear in only a few other sets: Tile Special 2 x 3 with 2 Clips without Tab between Clips (Green) ×6 — also in 31119 Ferris Wheel; Plate Special 1 x 3 with 2 Studs with Groove and Inside Stud Holder (Jumper) (Bright Light Yellow) ×3 — also in 10271 Fiat 500; Tile 1 x 1 Heart (Tan) ×2 — also in 80036 The City of Lanterns; Brick Special 1 x 1 x 3 with 2 Clips Vertical [Hollow Stud, Open O Clips] (Bright Light Orange) — also in 71367 Mario's House & Yoshi; Brick Special 1 x 2 x 5 with Groove (Blue) — also in 60141 Police Station; Plate 4 x 12 (Bright Light Yellow) ×2 — also in 60244 Police Helicopter Transport, 40533 Cosmic Cardboard Adventures; Box / Crate with Handholds 3 x 4 x 1 2/3 (Dark Red) — also in 43181 Raya and the Heart Palace, 4000037 LEGO Factory AGV; Door 1 x 5 x 3 with 3 Studs and Handle (Dark Blue) — also in 41367 Stephanie's Horse Jumping, 41683 Forest Horseback Riding Centre; Plate Special 1 x 8 with Door Rail (Medium Nougat) — also in 70657 NINJAGO City Docks, 41167 Arendelle Castle Village; Tile 1 x 1 with Rainbow, Sand Red, Yellow, Dark Azure, Medium Blue, Dark… (White) — also in 21045 Trafalgar Square, 41900 Rainbow Bracelet; Tile 1 x 2 with Peanut Package print (Dark Red) — also in 75547 Minion Pilot in Training, 60307 Wildlife Rescue Camp; Tile Round 1 x 1 with Chinese Candy print (White) — also in 80105 Chinese New Year Temple Fair, 80020 White Dragon Horse Jet; and 7 more.
• 8 moulds first came out in 2020, including in this set: Brick Round, Half 1 x 2 ×2; Plate Special 8-Sided Crystal/Gem 1 x 1 x 2/3 ×2; Tile Round 3 x 3 ×2; Animal, Rabbit / Bunny with Face and White Fur Print; Bar 1L / Stem with 3 Sprouts/Prongs; and 3 more.
• 59 existing moulds first came out in their colour in 2020, including in this set: Bracket 1 x 1 - 1 x 1 Inverted (Medium Nougat) ×12; Tile Round 1 x 1 Half Circle (Blue) ×10; Plate Special 1 x 2 Rounded with 2 Open Studs (Blue) ×6; Tile Special 2 x 3 with 2 Clips without Tab between Clips (Green) ×6; Equipment Candlestick (Black) ×5; and 54 more.
• 3 minifigure parts with their print are only in this set: Hips and Orange Legs with Dark Purple Stripes (Big Bird) (Orange); Torso Blue, Dark Orange, and Lime Striped Sweater Print (Bert), Lime Arms… (Lime); Torso Sweater with Yellow Collar, Blue, White, and Yellow Stripes Print… (Red).

Calculated from Rebrickable’s public set inventories, excluding sticker sheets and spare parts.