Blockletter

6 clues
Printing capital
Sans-serif character
Serif-free character
Easy-to-read character
Kindergartner's "A," e.g.
Character written in kindergarten
Similar answers:
Achipofftheoldblock
Adblock
Adblocker
Airletter
Airmailletter
Aletter
Alphabetblocks
Alphabetletters
Angryletter
Anonymousletter
Anvilblock
Aroundtheblock
Artlinkletter
Artsandletters
Auctionblock
Auctionblockage
Awardletter
Beatblocker
Beletterperfect
Betablocker