1, 20, 19
Actually, the order goes like this:
1. Give Mrs. Marie 1 Joy Pendant, the one from the Killer Bees. That adds up to 1. She gives you some Rupees for it.
2. Give Mrs. Marie 20 Joy Pendants all at once, adding up to 21 in total. She gives you the Cabana Deed for this.
3. Give Mrs. Marie 19 Joy Pendants for a total of 40. This can be done in segments of smaller Joy Pendant denominations. She gives you the Hero's Charm once the total reaches 40.
It's actually pretty obvious that this is the order. I've seen some guides say 50 is how many you need for the Hero's Charm, but there's a paper on the wall of the classroom that says how many you need for each reward, albeit cryptically.
--Cyberweasel89 18:12, 2 August 2010 (EDT)
40 not 60 and more rewards
I'm going to correct the amount you need to give her to get the heros charm. Also, once you have the heros charm, she'll give you rupees for more joy pendents up until she has 99. I'm not sure how its set up, but I've gotten a red rupee for giving her just one more, and an orange rupee for giving her a bunch more. I'm sure there's some sort of system in terms of how many extra joy pendents you give her and the corresponding rupee you receive. —Preceding unsigned comment added by Yomun (talk) 06:16, 4 October 2011 (UTC)