Answer: pinkyswear

AnswerCrossword Clue
PINKYSWEAR

Seal the deal, kid-style

PINKYSWEAR

Schoolyard handshake

PINKYSWEAR

Kids' digital deal-sealer

PINKYSWEAR
Schoolyard promise
PINKYSWEAR
Use a two-digit confirmation code?
PINKYSWEARSolemn vow, between kids
PINKYSWEARPlayground promise