What a delightful, creative collection! While most of the items are just for fun (Gauntlets of Ochre Power being one of my favorites), some could be authentically useful in a campaign, such as the Buzzing Bracelet of Eric, Marvellous Balloons, Valkur's Spinach Infusion, and Volo's Encyclopedia. My bard character already has a wise-cracking talking sword; some of these items would fit right in with our high roleplay, puzzles-over-combat campaign. And for a good cause, too.
[5 of 5 Stars!]