Primo was a theme introduced in 1995 and phased out in 1999 when it was replaced by Baby. Its line included Stack-n-Learn, Teethers, Tub Toys, and Trains subthemes.
Sets[]
- 1456 Squirt the Frog
- 1787 Primo Polybag
- 2000 Teether
- 2001 3-in-1
- 2002 Jumbo Building Bag
- 2003 Jumbo Building Bag
- 2005 DUPLO PRIMO
- 2007 Musical Camel
- 2010 Baby Walker
- 2011 My Little Home
- 2012 Ladybug Storage
- 2013 Choo-Choo Train
- 2017 Choo-Choo Train
- 2018 Storage Boy
- 2021 Gift Set
- 2022 Ride-On Elephant
- 2028 Try-Me-Set with Bee
- 2029 Stack-n-Learn Set
- 2030 Squirt the Frog
- 2031 Tiny Turtle
- 2039 Paddle Boat
- 2044 Waterlily Princess and Friend
- 2046 Scoop N' Squirt Fun Pack
- 2048 Water Friends
- 2071 Rock 'n Go Pilot
- 2076 Peek-a-Boo Playhouse
- 2081 Small Stack-n-Learn
- 2083 Medium Stack-n-Learn
- 2085 Storage Frog
- 2087 Polly Parrot Storage Bird
- 2089 X-Large Gift Set
- 2091 Primo Tumbler
- 2092 Primo Canister
- 2093 Ladybird
- 2094 Duck in Travel House
- 2095 Roll 'n Play
- 2096 Rock 'N' Stack
- 2097 Caterpillar
- 2098 Play Boat
- 2099 Shape Sorter
- 2101 Circus Catapult
- 2103 Busy Builder Starter Set
- 2104 Wilma Whale
- 2106 Scoop & Squirt Fun Pack
- 2107 Turtle Wagon
- 2108 Perky Paddler
- 2117 Peek-a-Boo Playmat
- 2190 Storage Frog
- 2589 Timmy on Tour Stack 'n' Learn
- 2974 Play Train
- 3212 Star Teether
- 3235 Ladybug and Bee
- 3236 Roll n' Play
- 3237 Stacking Tower
- 3238 Shape and Colour Sorter
- 5021 Green and Blue Train Cars
- 5022 Converter Bricks
- 5421 Star Teether
- 5424 Take Along Friend
- 5425 Soft Stacking Hen
- 5427 Light and Sound Stacker
- 5428 Musical Apple
- 5429 Play Plane
- 5431 Roll 'n' Play
- 5432 Bendy Caterpillar
- 5433 Stacking Tower
- 5434 LEGO Baby Stack 'n Learn
- 5441 Smiling Rattle
- 5443 Curly Hanging Rattle
- 5446 Roll 'n' Tip
- 5449 Stack 'n' Learn Sorter
- 5028 DUPLO Primo Plate 4 x 4 Blue
- 9001 Bonus Stack 'n' Learn Set
- 9003 Large Stack 'n' Learn Set
- 9005 Stack-n-Learn Building Blocks
- 9009 Stack 'n' Learn Giant Set
- 9010 Deluxe Stack 'n'Learn Set
- 9012 Large Stack 'n' Learn Set
- 9013 Infant Activity Set
- 9017 Baby Discovery Set
- 9019 Baby Stack 'n' Learn Set
- 9026 Baby Stack 'n' Learn Set