User blog comment:Amir kani61/favorite event/@comment-24457062-20140520111704/@comment-24457062-20140520125314

Yes Amir ...given their low power/staff use...the Android Park and Toy Workshop are excellent choices. I did it because I was bored and had lots of buildings sitting in my inventory from all the events...lol

My favourite was building, upgrading (expedited) and demolishing 5 Icecream Castles...relatively good XP gain! I still have one more Android Park in my inventory...so will build it later. Prior to the Google Birthday event, I had already built 3 Toy Workshops and stacked them with gems (one has five gems - including a Santa Sack) - because the initial estimated profitability on Wiki was over $1000/hr/tile. This profit was later amended - but I am too cheap to pay the piastres to extract these gems :-)