Well crafted icicle wand from melted snow freezing. Has a icy core and is useless in summer time. Can be stored in freezer to protect from melting. Hmm.... what spell should I cast? Of course I'll start with my favorite, Expecto patronum, My patronus is a Robin, I'm not kidding, I did a quiz and got a robin!!
Edit: My mom threw it away when she found it hidden in the freezer ;-;
