BrickLink - Set 6051-1 : LEGO Play with Letters [Duplo] - BrickLink Reference Catalog
Alphabet Truck 10915 | DUPLO® | Buy online at the Official LEGO® Shop US
Amazon.com: LEGO DUPLO My First Alphabet Truck 10915 ABC Letters Learning Toy for Toddlers, Fun Kids' Educational Building Toy (36 Pieces) : Toys & Games