Wikia

The Wishing Well was a special building added during the 2013 Easter holiday event. It has a random chance to produce goods dependent on the age that you are currently in, which makes it the first holiday building to scale with your empire. There is a rather excellent write up on this topic, which is where the below table came from. [1]

Age	Coins	Supplies	Goods	Medals	FP	Diamonds
BA	450	450	10 BA Goods	2	2	50
IA	1080	1080	10 IA Goods	3	2	50
EMA	1800	1800	10 EMA Goods	5	2	50
HMA	2520	2500	10 HMA Goods	10	2	50
LMA	3330	3330	10 LMA Goods	19	2	50
CA	5060	5060	10 CA Goods	31	2	50
IndA	6320	6320	10 IndA Goods	49	2	50
PE	7670	7670	10 PE Goods	65	2	50
ME			20 CA Goods	90	2	50