1. It was fun for Tom to play with snow.

Question

2. It was fun of Tom to play with snow.

3. It was funny for Tom to play with snow.

4. It was funny of Tom to play with snow.
(Which ones are grammatical?)

Answer 1

Not "of" Tom. #1 and #3 are fine but #2 and #4 sound awkward, possible but definitely not as good as "for."

Sra