3 piece puzzle toy

3 piece puzzle toy
The solution is available at the web address
http://www.comstockps.org/gumballs
but please try your best before resorting that.

This is a design for the gumball machine challenge held at the 2016 Bay Area Maker Faire!
http://wwmt.com/news/local/gumball-machine-challenge-allows-local-kids-to-compete-in-makers-faire
http://www.comstockps.org/gumballs