What's the difference between frolicsome and kiddyish?

Frolicsome

Definition:

• (a.) Full of gayety and mirth; given to pranks; sportive.

Example Sentences:

• (1) Grass was awarded the Nobel Prize in 1999 for his "frolicsome black fables [which] portray the forgotten face of history".

Kiddyish

Definition:

• (a.) Frolicsome; sportive.

Example Sentences: