Jack Frost's Snowflake

Snowflakes are one of the ice items Jack Frost creates to fill people up with fun.

Appearance
The ice snowflakes (that are filled with fun) sometimes take the form of snowballs.

Lore
Snowflakes are one of the ice items Jack creates and fills with fun before passing/toasting/throwing it to kids/people so they can playing (snow) games with their friends. Like he did with Jamie and his friends with a snowball.

At the Warren Jack created a small snowflake before sending it to Bunny so he could play with Sophie Bennett, while they and the rest of the guardians got ready for Easter. He also brought an ice rabbit to life to restore Jamie's believeth in the guardians, before it bust into snow once Jamie touched it. Seeing snow falling in his room got him to believe in Jack Frost. (Weaver or not the snowball Jack throw at Jamie once the guardians' strength returned was filled with fun is unknown.)

Role in the Crossover
Fans see the snowflake that Jack creates at the end of the film (or any other snowflake) as his RotBTD crest.