Produce speedups

[katherinejo2007]

I'm trying to complete a challenge where I make epic buildings.I have them all checked except The last one on the list-produce speedups. Mine says 3/10 however I have collected enough to where I know I should of completed it by now. What am I missing!?

[katherinejo2007]

I have 5 or so epic building. But they are producing llama speed ups (the slow ones) ... but I've gatherered enough to have to use them to gather more. I am just confused to why I'm not getting anywhere with the last challenge

[kittikat273]

It looks like you need to collect 7 more speed ups. Each one takes multiple coins, so if you only picked 3 coins off the buildings, you need more. When you get a coin, check the lower left corner, it shows how many coins you need for each usable speed up coin. Somewhere around 5 each, depending on your level. Hope that helps