maybe a jack frost kit. a kit where he/she has 4 stacks of snowballs, an iron sword (named an icicle) and speed.
I see your idea but... perhaps the player has never heard of Jack Frost? So I decided to keep your idea... But do a few tweaks. Snowman kit: 4 stacks of snowballs (for stone, 5 stacks for iron, 6 for lapiz, 7 for gold etc), that give random effects when thrown. (Like poison) White leather armour (no enchantment for stone, protection 1 for iron, 2 for lapiz etc). And an iron sword (no enchantment for stone, protection 1 for iron etc).
Yeah. And an iron sword for Iron donators, Iron sword with sharpness 1 for Lapiz, Iron sword with sharpness 2 for gold etc.
This kit is nice! It is kind of like alchemist though with the snowballs. I may just be over thinking it too much though.