No information was found regarding a US nonprofit organization named Joyamp with EIN 460690502. Therefore, it's not possible to create an article for Wikipedia-style content on this organization based on the available data.

[1] https://www.joyworldwideinc.com [2] https://www.joy.org [3] https://mgapprovednonprofits.org/camp-joy/ [4] https://www.causeiq.com/organizations/joy-outdoor-education-center-foundation,310672822/ [5] https://www.shejumps.org